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Cilium, the Glossary

Index Cilium

The cilium (cilia;; in anatomy, cilium is an eyelash) is a membrane-bound organelle found on most types of eukaryotic cell.[1]

Table of Contents

  1. 116 relations: Adenosine triphosphate, Allosteric regulation, Alström syndrome, Animal embryonic development, Anterior segment mesenchymal dysgenesis, Archaea, Aurora kinase A, Axon, Axonal transport, Axoneme, Bacteria, Bardet–Biedl syndrome, Basal body, Beta cell, Bilateria, Biofilm, Brain, Caenorhabditis elegans, Cell (biology), Cell membrane, Cell nucleus, CEP164, CEP170, Cerebrospinal fluid, Chemoreceptor, Chlamydomonas reinhardtii, Choroid plexus, Ciliate, Ciliogenesis, Ciliopathy, Cilium, Congenital heart defect, Cystic fibrosis, Cystic fibrosis transmembrane conductance regulator, Cytoskeleton, Drosophila melanogaster, Dynein, Ectopic pregnancy, Egg cell, Ependyma, Epigenetics, Epithelial sodium channel, Epithelium, Eukaryote, Eyelash, Eyelid, Fallopian tube, Flagellum, G protein-coupled receptor, G1 phase, ... Expand index (66 more) »

  2. Cell movement
  3. Eukaryotic cell anatomy

Adenosine triphosphate

Adenosine triphosphate (ATP) is a nucleotide that provides energy to drive and support many processes in living cells, such as muscle contraction, nerve impulse propagation, and chemical synthesis.

See Cilium and Adenosine triphosphate

Allosteric regulation

In the fields of biochemistry and pharmacology an allosteric regulator (or allosteric modulator) is a substance that binds to a site on an enzyme or receptor distinct from the active site, resulting in a conformational change that alters the protein's activity, either enhancing or inhibiting its function.

See Cilium and Allosteric regulation

Alström syndrome

Alström syndrome (AS), also called Alström–Hallgren syndrome, is a very rare autosomal recessive genetic disorder characterised by childhood obesity and multiple organ dysfunction.

See Cilium and Alström syndrome

Animal embryonic development

In developmental biology, animal embryonic development, also known as animal embryogenesis, is the developmental stage of an animal embryo.

See Cilium and Animal embryonic development

Anterior segment mesenchymal dysgenesis

Anterior segment mesenchymal dysgenesis, or simply anterior segment dysgenesis (ASD), is a failure of the normal development of the tissues of the anterior segment of the eye.

See Cilium and Anterior segment mesenchymal dysgenesis

Archaea

Archaea (archaeon) is a domain of single-celled organisms.

See Cilium and Archaea

Aurora kinase A

Aurora kinase A also known as serine/threonine-protein kinase 6 is an enzyme that in humans is encoded by the AURKA gene.

See Cilium and Aurora kinase A

Axon

An axon (from Greek ἄξων áxōn, axis) or nerve fiber (or nerve fibre: see spelling differences) is a long, slender projection of a nerve cell, or neuron, in vertebrates, that typically conducts electrical impulses known as action potentials away from the nerve cell body.

See Cilium and Axon

Axonal transport

Axonal transport, also called axoplasmic transport or axoplasmic flow, is a cellular process responsible for movement of mitochondria, lipids, synaptic vesicles, proteins, and other organelles to and from a neuron's cell body, through the cytoplasm of its axon called the axoplasm.

See Cilium and Axonal transport

Axoneme

In molecular biology, an axoneme, also called an axial filament, is the microtubule-based cytoskeletal structure that forms the core of a cilium or flagellum. Cilium and axoneme are eukaryotic cell anatomy and organelles.

See Cilium and Axoneme

Bacteria

Bacteria (bacterium) are ubiquitous, mostly free-living organisms often consisting of one biological cell.

See Cilium and Bacteria

Bardet–Biedl syndrome

Bardet–Biedl syndrome (BBS) is a ciliopathic human genetic disorder that produces many effects and affects many body systems.

See Cilium and Bardet–Biedl syndrome

Basal body

A basal body (synonymous with basal granule, kinetosome, and in older cytological literature with blepharoplast) is a protein structure found at the base of a eukaryotic undulipodium (cilium or flagellum). The basal body was named by Theodor Wilhelm Engelmann in 1880. It is formed from a centriole and several additional protein structures, and is, essentially, a modified centriole. Cilium and basal body are organelles.

See Cilium and Basal body

Beta cell

Beta cells (β-cells) are specialized endocrine cells located within the pancreatic islets of Langerhans responsible for the production and release of insulin and amylin.

See Cilium and Beta cell

Bilateria

Bilateria is a large clade or infrakingdom of animals called bilaterians, characterized by bilateral symmetry (i.e. having a left and a right side that are mirror images of each other) during embryonic development.

See Cilium and Bilateria

Biofilm

A biofilm is a syntrophic community of microorganisms in which cells stick to each other and often also to a surface.

See Cilium and Biofilm

Brain

The brain is an organ that serves as the center of the nervous system in all vertebrate and most invertebrate animals.

See Cilium and Brain

Caenorhabditis elegans

Caenorhabditis elegans is a free-living transparent nematode about 1 mm in length that lives in temperate soil environments.

See Cilium and Caenorhabditis elegans

Cell (biology)

The cell is the basic structural and functional unit of all forms of life.

See Cilium and Cell (biology)

Cell membrane

The cell membrane (also known as the plasma membrane or cytoplasmic membrane, and historically referred to as the plasmalemma) is a biological membrane that separates and protects the interior of a cell from the outside environment (the extracellular space). Cilium and cell membrane are organelles.

See Cilium and Cell membrane

Cell nucleus

The cell nucleus (nuclei) is a membrane-bound organelle found in eukaryotic cells. Cilium and cell nucleus are eukaryotic cell anatomy and organelles.

See Cilium and Cell nucleus

CEP164

Centrosomal protein of 164 kDa, also known as CEP164, is a protein that in humans is encoded by the CEP164 gene.

See Cilium and CEP164

CEP170

Centrosomal protein 170kDa, also known as CEP170, is a protein that in humans is encoded by the CEP170 gene.

See Cilium and CEP170

Cerebrospinal fluid

Cerebrospinal fluid (CSF) is a clear, colorless body fluid found within the tissue that surrounds the brain and spinal cord of all vertebrates.

See Cilium and Cerebrospinal fluid

Chemoreceptor

A chemoreceptor, also known as chemosensor, is a specialized sensory receptor which transduces a chemical substance (endogenous or induced) to generate a biological signal.

See Cilium and Chemoreceptor

Chlamydomonas reinhardtii

Chlamydomonas reinhardtii is a single-cell green alga about 10 micrometres in diameter that swims with two flagella.

See Cilium and Chlamydomonas reinhardtii

Choroid plexus

The choroid plexus, or plica choroidea, is a plexus of cells that arises from the tela choroidea in each of the ventricles of the brain.

See Cilium and Choroid plexus

Ciliate

The ciliates are a group of alveolates characterized by the presence of hair-like organelles called cilia, which are identical in structure to eukaryotic flagella, but are in general shorter and present in much larger numbers, with a different undulating pattern than flagella.

See Cilium and Ciliate

Ciliogenesis

Ciliogenesis is defined as the building of the cell's antenna (primary cilia) or extracellular fluid mediation mechanism (motile cilium). Cilium and Ciliogenesis are organelles.

See Cilium and Ciliogenesis

Ciliopathy

A ciliopathy is any genetic disorder that affects the cellular cilia or the cilia anchoring structures, the basal bodies, or ciliary function.

See Cilium and Ciliopathy

Cilium

The cilium (cilia;; in anatomy, cilium is an eyelash) is a membrane-bound organelle found on most types of eukaryotic cell. Cilium and cilium are cell movement, eukaryotic cell anatomy and organelles.

See Cilium and Cilium

Congenital heart defect

A congenital heart defect (CHD), also known as a congenital heart anomaly, congenital cardiovascular malformation, and congenital heart disease, is a defect in the structure of the heart or great vessels that is present at birth.

See Cilium and Congenital heart defect

Cystic fibrosis

Cystic fibrosis (CF) is a genetic disorder inherited in an autosomal recessive manner that impairs the normal clearance of mucus from the lungs, which facilitates the colonization and infection of the lungs by bacteria, notably Staphylococcus aureus.

See Cilium and Cystic fibrosis

Cystic fibrosis transmembrane conductance regulator

Cystic fibrosis transmembrane conductance regulator (CFTR) is a membrane protein and anion channel in vertebrates that is encoded by the CFTR gene.

See Cilium and Cystic fibrosis transmembrane conductance regulator

Cytoskeleton

The cytoskeleton is a complex, dynamic network of interlinking protein filaments present in the cytoplasm of all cells, including those of bacteria and archaea. Cilium and cytoskeleton are eukaryotic cell anatomy.

See Cilium and Cytoskeleton

Drosophila melanogaster

Drosophila melanogaster is a species of fly (an insect of the order Diptera) in the family Drosophilidae.

See Cilium and Drosophila melanogaster

Dynein

Dyneins are a family of cytoskeletal motor proteins that move along microtubules in cells.

See Cilium and Dynein

Ectopic pregnancy

Ectopic pregnancy is a complication of pregnancy in which the embryo attaches outside the uterus.

See Cilium and Ectopic pregnancy

Egg cell

The egg cell or ovum (ova) is the female reproductive cell, or gamete, in most anisogamous organisms (organisms that reproduce sexually with a larger, female gamete and a smaller, male one).

See Cilium and Egg cell

Ependyma

The ependyma is the thin neuroepithelial (simple columnar ciliated epithelium) lining of the ventricular system of the brain and the central canal of the spinal cord.

See Cilium and Ependyma

Epigenetics

In biology, epigenetics is the study of heritable traits, or a stable change of cell function, that happen without changes to the DNA sequence.

See Cilium and Epigenetics

Epithelial sodium channel

The epithelial sodium channel (ENaC), (also known as amiloride-sensitive sodium channel) is a membrane-bound ion channel that is selectively permeable to sodium ions.

See Cilium and Epithelial sodium channel

Epithelium

Epithelium or epithelial tissue is a thin, continuous, protective layer of compactly packed cells with little extracellular matrix.

See Cilium and Epithelium

Eukaryote

The eukaryotes constitute the domain of Eukarya or Eukaryota, organisms whose cells have a membrane-bound nucleus.

See Cilium and Eukaryote

Eyelash

An eyelash (also called lash) (Neo-Latin: cilium, plural cilia) is one of the hairs that grows at the edges of the top and bottom eyelids, spanning outwards and away from the eyes.

See Cilium and Eyelash

Eyelid

An eyelid is a thin fold of skin that covers and protects an eye.

See Cilium and Eyelid

Fallopian tube

The fallopian tubes, also known as uterine tubes, oviducts or salpinges (salpinx), are paired tubes in the human female body that stretch from the ovaries to the uterus.

See Cilium and Fallopian tube

Flagellum

A flagellum (flagella) (Latin for 'whip' or 'scourge') is a hairlike appendage that protrudes from certain plant and animal sperm cells, from fungal spores (zoospores), and from a wide range of microorganisms to provide motility. Cilium and flagellum are cell movement and organelles.

See Cilium and Flagellum

G protein-coupled receptor

G protein-coupled receptors (GPCRs), also known as seven-(pass)-transmembrane domain receptors, 7TM receptors, heptahelical receptors, serpentine receptors, and G protein-linked receptors (GPLR), form a large group of evolutionarily related proteins that are cell surface receptors that detect molecules outside the cell and activate cellular responses.

See Cilium and G protein-coupled receptor

G1 phase

The G1 phase, gap 1 phase, or growth 1 phase, is the first of four phases of the cell cycle that takes place in eukaryotic cell division.

See Cilium and G1 phase

Hair cell

Hair cells are the sensory receptors of both the auditory system and the vestibular system in the ears of all vertebrates, and in the lateral line organ of fishes.

See Cilium and Hair cell

Hedgehog signaling pathway

The Hedgehog signaling pathway is a signaling pathway that transmits information to embryonic cells required for proper cell differentiation.

See Cilium and Hedgehog signaling pathway

Implantation (embryology)

Implantation, also known as nidation, is the stage in the mammalian embryonic development in which the blastocyst hatches, attaches, adheres, and invades into the endometrium of the female's uterus.

See Cilium and Implantation (embryology)

Intraflagellar transport

Intraflagellar transport (IFT) is a bidirectional motility along axoneme microtubules that is essential for the formation (ciliogenesis) and maintenance of most eukaryotic cilia and flagella.

See Cilium and Intraflagellar transport

Intrinsically disordered proteins

In molecular biology, an intrinsically disordered protein (IDP) is a protein that lacks a fixed or ordered three-dimensional structure, typically in the absence of its macromolecular interaction partners, such as other proteins or RNA.

See Cilium and Intrinsically disordered proteins

Kinocilium

A kinocilium is a special type of cilium on the apex of hair cells located in the sensory epithelium of the vertebrate inner ear.

See Cilium and Kinocilium

Left-right asymmetry

In developmental biology, left-right asymmetry (LR asymmetry) is the process in early embryonic development that breaks the normal symmetry in the bilateral embryo.

See Cilium and Left-right asymmetry

Lumen (anatomy)

In biology, a lumen (lumina) is the inside space of a tubular structure, such as an artery or intestine.

See Cilium and Lumen (anatomy)

Lung

The lungs are the central organs of the respiratory system in humans and some other animals, including tetrapods, some snails and a small number of fish.

See Cilium and Lung

Mammal

A mammal is a vertebrate animal of the class Mammalia.

See Cilium and Mammal

Mechanosensation

Mechanosensation is the transduction of mechanical stimuli into neural signals.

See Cilium and Mechanosensation

Meckel–Gruber syndrome

Meckel-Gruber syndrome is a rare, lethal ciliopathic genetic disorder, characterized by renal cystic dysplasia, central nervous system malformations (occipital encephalocele), polydactyly (postaxial), hepatic developmental defects, and pulmonary hypoplasia due to oligohydramnios.

See Cilium and Meckel–Gruber syndrome

A metachronal rhythm or metachronal wave refers to wavy movements produced by the sequential action (as opposed to synchronized) of structures such as cilia, segments of worms, or legs.

See Cilium and Metachronal rhythm

Microorganism

A microorganism, or microbe, is an organism of microscopic size, which may exist in its single-celled form or as a colony of cells. The possible existence of unseen microbial life was suspected from ancient times, such as in Jain scriptures from sixth century BC India. The scientific study of microorganisms began with their observation under the microscope in the 1670s by Anton van Leeuwenhoek.

See Cilium and Microorganism

Microtubule

Microtubules are polymers of tubulin that form part of the cytoskeleton and provide structure and shape to eukaryotic cells.

See Cilium and Microtubule

Microtubule organizing center

The microtubule-organizing center (MTOC) is a structure found in eukaryotic cells from which microtubules emerge.

See Cilium and Microtubule organizing center

Mitral valve prolapse

Mitral valve prolapse (MVP) is a valvular heart disease characterized by the displacement of an abnormally thickened mitral valve leaflet into the left atrium during systole.

See Cilium and Mitral valve prolapse

Molecular machine

Molecular machines are a class of molecules typically described as an assembly of a discrete number of molecular components intended to produce mechanical movements in response to specific stimuli, mimicking macromolecular devices such as switches and motors.

See Cilium and Molecular machine

Molecular sensor

A molecular sensor or chemosensor is a molecular structure (organic or inorganic complexes) that is used for sensing of an analyte to produce a detectable change or a signal.

See Cilium and Molecular sensor

Motility

Motility is the ability of an organism to move independently, using metabolic energy. Cilium and Motility are cell movement.

See Cilium and Motility

Motor protein

Motor proteins are a class of molecular motors that can move along the cytoskeleton of cells. Cilium and motor protein are cell movement.

See Cilium and Motor protein

Mucociliary clearance

Mucociliary clearance (MCC), mucociliary transport, or the mucociliary escalator describes the self-clearing mechanism of the airways in the respiratory system.

See Cilium and Mucociliary clearance

Mucus

Mucus is a slippery aqueous secretion produced by, and covering, mucous membranes.

See Cilium and Mucus

Nephronophthisis

Nephronophthisis is a genetic disorder of the kidneys which affects children.

See Cilium and Nephronophthisis

Neuron

A neuron, neurone, or nerve cell is an excitable cell that fires electric signals called action potentials across a neural network in the nervous system.

See Cilium and Neuron

Nexin

Nexin is a proteinous inter-doublet linkage that prevents microtubules in the outer layer of axonemes from moving with respect to one another; otherwise, vesicular transport proteins such as dynein would dissolve the whole structure.

See Cilium and Nexin

ODF2

Outer dense fiber protein 2, also known as cenexin, is a protein that in humans is encoded by the ODF2 gene.

See Cilium and ODF2

Olfactory receptor

Olfactory receptors (ORs), also known as odorant receptors, are chemoreceptors expressed in the cell membranes of olfactory receptor neurons and are responsible for the detection of odorants (for example, compounds that have an odor) which give rise to the sense of smell.

See Cilium and Olfactory receptor

Olfactory receptor neuron

An olfactory receptor neuron (ORN), also called an olfactory sensory neuron (OSN), is a sensory neuron within the olfactory system.

See Cilium and Olfactory receptor neuron

Oocyte

An oocyte, oöcyte, or ovocyte is a female gametocyte or germ cell involved in reproduction.

See Cilium and Oocyte

Organelle

In cell biology, an organelle is a specialized subunit, usually within a cell, that has a specific function. Cilium and organelle are organelles.

See Cilium and Organelle

Ovary

The ovary is a gonad in the female reproductive system that produces ova.

See Cilium and Ovary

Oviduct

The oviduct in vertebrates is the passageway from an ovary.

See Cilium and Oviduct

Paramecium

Paramecium (plural "paramecia" only when used as a vernacular name) is a genus of eukaryotic, unicellular ciliates, widespread in freshwater, brackish, and marine environments.

See Cilium and Paramecium

Plasmodium falciparum

Plasmodium falciparum is a unicellular protozoan parasite of humans, and the deadliest species of Plasmodium that causes malaria in humans.

See Cilium and Plasmodium falciparum

Pleiotropy

Pleiotropy (from Greek, 'more', and, 'way') occurs when one gene influences two or more seemingly unrelated phenotypic traits.

See Cilium and Pleiotropy

Polycystic kidney disease

Polycystic kidney disease (PKD or PCKD, also known as polycystic kidney syndrome) is a genetic disorder in which the renal tubules become structurally abnormal, resulting in the development and growth of multiple cysts within the kidney.

See Cilium and Polycystic kidney disease

Polycystic liver disease

Polycystic liver disease (PLD) usually describes the presence of multiple cysts scattered throughout normal liver tissue.

See Cilium and Polycystic liver disease

Primary ciliary dyskinesia

Primary ciliary dyskinesia (PCD) is a rare, autosomal recessive genetic ciliopathy, that causes defects in the action of cilia lining the upper and lower respiratory tract, sinuses, Eustachian tube, middle ear, fallopian tube, and flagella of sperm cells.

See Cilium and Primary ciliary dyskinesia

Primitive node

The primitive node (or primitive knot) is the organizer for gastrulation in most amniote embryos.

See Cilium and Primitive node

Protozoa

Protozoa (protozoan or protozoon; alternative plural: protozoans) are a polyphyletic group of single-celled eukaryotes, either free-living or parasitic, that feed on organic matter such as other microorganisms or organic debris.

See Cilium and Protozoa

Pseudohypoaldosteronism

Pseudohypoaldosteronism (PHA) is a condition that mimics hypoaldosteronism.

See Cilium and Pseudohypoaldosteronism

Pyramidal cell

Pyramidal cells, or pyramidal neurons, are a type of multipolar neuron found in areas of the brain including the cerebral cortex, the hippocampus, and the amygdala.

See Cilium and Pyramidal cell

Reproductive system

The reproductive system of an organism, also known as the genital system, is the biological system made up of all the anatomical organs involved in sexual reproduction.

See Cilium and Reproductive system

Respiratory epithelium

Respiratory epithelium, or airway epithelium, is a type of ciliated columnar epithelium found lining most of the respiratory tract as respiratory mucosa, where it serves to moisten and protect the airways.

See Cilium and Respiratory epithelium

Retinopathy

Retinopathy is any damage to the retina of the eyes, which may cause vision impairment.

See Cilium and Retinopathy

Rootletin

Rootletin also known as ciliary rootlet coiled-coil protein (CROCC) is a protein that in humans is encoded by the CROCC gene.

See Cilium and Rootletin

Scanning electron microscope

A scanning electron microscope (SEM) is a type of electron microscope that produces images of a sample by scanning the surface with a focused beam of electrons.

See Cilium and Scanning electron microscope

Secretion

Secretion is the movement of material from one point to another, such as a secreted chemical substance from a cell or gland.

See Cilium and Secretion

Senior–Løken syndrome

Senior–Løken syndrome is a congenital eye disorder, first characterized in 1961.

See Cilium and Senior–Løken syndrome

Sensenbrenner syndrome

Sensenbrenner syndrome (OMIM #218330) is a rare (less than 20 cases reported by 2010) multisystem disease first described by Judith A. Sensenbrenner in 1975.

See Cilium and Sensenbrenner syndrome

Serotonin

Serotonin or 5-hydroxytryptamine (5-HT) is a monoamine neurotransmitter.

See Cilium and Serotonin

Situs ambiguus

Situs ambiguus, or heterotaxy, is a rare congenital defect in which the major visceral organs are distributed abnormally within the chest and abdomen.

See Cilium and Situs ambiguus

Situs inversus

Situs inversus (also called situs transversus or oppositus) is a congenital condition in which the major visceral organs are reversed or mirrored from their normal positions.

See Cilium and Situs inversus

Smooth muscle

Smooth (soft) muscle is one of the three major types of vertebrate muscle tissue, the other being skeletal and cardiac muscle.

See Cilium and Smooth muscle

Somatostatin receptor 3

Shekel Somatostatin receptor type 3 is a protein that in humans is encoded by the SSTR3 gene.

See Cilium and Somatostatin receptor 3

Sperm

Sperm (sperm or sperms) is the male reproductive cell, or gamete, in anisogamous forms of sexual reproduction (forms in which there is a larger, female reproductive cell and a smaller, male one).

See Cilium and Sperm

Synapse

In the nervous system, a synapse is a structure that permits a neuron (or nerve cell) to pass an electrical or chemical signal to another neuron or to the target effector cell.

See Cilium and Synapse

Theria

Theria is a subclass of mammals amongst the Theriiformes.

See Cilium and Theria

Thermoception

In physiology, thermoception or thermoreception is the sensation and perception of temperature, or more accurately, temperature differences inferred from heat flux.

See Cilium and Thermoception

Trachea

The trachea (tracheae or tracheas), also known as the windpipe, is a cartilaginous tube that connects the larynx to the bronchi of the lungs, allowing the passage of air, and so is present in almost all animals with lungs.

See Cilium and Trachea

Tubulin

Tubulin in molecular biology can refer either to the tubulin protein superfamily of globular proteins, or one of the member proteins of that superfamily.

See Cilium and Tubulin

Type 2 diabetes

Type 2 diabetes (T2D), formerly known as adult-onset diabetes, is a form of diabetes mellitus that is characterized by high blood sugar, insulin resistance, and relative lack of insulin.

See Cilium and Type 2 diabetes

Uterus

The uterus (from Latin uterus,: uteri) or womb is the organ in the reproductive system of most female mammals, including humans, that accommodates the embryonic and fetal development of one or more embryos until birth.

See Cilium and Uterus

Ventricular system

In neuroanatomy, the ventricular system is a set of four interconnected cavities known as cerebral ventricles in the brain.

See Cilium and Ventricular system

Vestigiality

Vestigiality is the retention, during the process of evolution, of genetically determined structures or attributes that have lost some or all of the ancestral function in a given species.

See Cilium and Vestigiality

See also

Cell movement

Eukaryotic cell anatomy

References

[1] https://en.wikipedia.org/wiki/Cilium

Also known as Cellular antenna, Cilia, Ciliary motion, Ciliary rootlet, Ciliary transition zone, Ciliate cells, Ciliated, Cilius, Cirrus (organ), Motile cilia, Motile cilium, Nodal cells, Nodal cilia, Primary cilia, Primary cilium.

, Hair cell, Hedgehog signaling pathway, Implantation (embryology), Intraflagellar transport, Intrinsically disordered proteins, Kinocilium, Left-right asymmetry, Lumen (anatomy), Lung, Mammal, Mechanosensation, Meckel–Gruber syndrome, Metachronal rhythm, Microorganism, Microtubule, Microtubule organizing center, Mitral valve prolapse, Molecular machine, Molecular sensor, Motility, Motor protein, Mucociliary clearance, Mucus, Nephronophthisis, Neuron, Nexin, ODF2, Olfactory receptor, Olfactory receptor neuron, Oocyte, Organelle, Ovary, Oviduct, Paramecium, Plasmodium falciparum, Pleiotropy, Polycystic kidney disease, Polycystic liver disease, Primary ciliary dyskinesia, Primitive node, Protozoa, Pseudohypoaldosteronism, Pyramidal cell, Reproductive system, Respiratory epithelium, Retinopathy, Rootletin, Scanning electron microscope, Secretion, Senior–Løken syndrome, Sensenbrenner syndrome, Serotonin, Situs ambiguus, Situs inversus, Smooth muscle, Somatostatin receptor 3, Sperm, Synapse, Theria, Thermoception, Trachea, Tubulin, Type 2 diabetes, Uterus, Ventricular system, Vestigiality.