A gonad of a male animal. A gonad produces and releases sperm. [ http://orcid.org/0000-0002-6601-2165 ]

Synonyms: gonad of male reproductive system male gonad testicle gonad of male genitalia

This is just here as a test because I lose it

Term information

database cross reference
Subsets

uberon_slim, efo_slim, pheno_slim, vertebrate_core, organ_slim

depicted by

http://upload.wikimedia.org/wikipedia/commons/c/c3/Gray1144.png

external definition

Male reproductive organ.[TAO]

has alternative id

UBERON:0002117

has related synonym

testiculus
testes
orchis

homology notes

(...) while it is likely that Urbilateria lacked a complex somatic reproductive system, it is at present impossible to speculate on whether or not it possessed a true gonad, let alone any other somatic adaptations for reproduction (reference 1); Examination of different vertebrate species shows that the adult gonad is remarkably similar in its morphology across different phylogenetic classes. Surprisingly, however, the cellular and molecular programs employed to create similar organs are not evolutionarily conserved (reference 2).[uncertain][VHOG]

id

UBERON:0000473

taxon notes

The testes are descended in metatherian and eutherian mammals, first transabdominally, then inguinoscrotally