Uberon definition : A gonad of a male animal. A gonad produces and releases sperm.;
Uberon synonym : testicle; gonad of male reproductive system; male gonad; gonad of male genitalia;
Uberon related term : testes; orchis;
Uberon Homology note : (...) 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];
Uberon Taxon note : The testes are descended in metatherian and eutherian mammals, first transabdominally,
then inguinoscrotally;