| Name: | sperm |
|---|---|
| Synonyms: | sperm cell, spermatozoid, spermatozoon |
| Definition: | A mature male germ cell that develops from a spermatid. |
| Ontology: | Anatomy Ontology [ZFA:0009006] |
| Name: | centriole |
|---|---|
| Synonyms: | daughter centriole, mother centriole |
| Definition: | A cellular organelle, found close to the nucleus in many eukaryotic cells, consisting of a small cylinder with microtubular walls, 300-500 nm long and 150-250 nm in diameter. It contains nine short, parallel, peripheral microtubular fibrils, each fibril consisting of one complete microtubule fused to two incomplete microtubules. Cells usually have two centrioles, lying at right angles to each other. At division, each pair of centrioles generates another pair and the twin pairs form the pole of the mitotic spindle. |
| Ontology: | GO: Cellular Component [GO:0005814] QuickGO AmiGO |
| Name: | composition |
|---|---|
| Synonyms: | composed of, compositionality, content, structure, composition |
| Definition: | A single physical entity inhering in an bearer by virtue of the bearer's quantities or relative ratios of subparts. |
| Ontology: | Phenotypic Quality Ontology [PATO:0000025] |