Preferred Label : ovary;
Uberon definition : the gonad of a female organism which contains germ cells;
Uberon synonym : gonada of female organism genitalia; gonad of female organism genitalia; genitalia of female organism gonad; gonad of reproductive system of female organism; gonada of female organism reproductive system; genitalia of female organism gonada; gonada of genitalia of female organism; female reproductive system gonada; gonad of genitalia of female organism; female organism genitalia gonada; female reproductive system gonad; female gonad; animal ovary; female organism genitalia gonad; female organism reproductive system gonada; gonada of female reproductive system; gonad of female reproductive system; reproductive system of female organism gonad; female organism reproductive system gonad; reproductive system of female organism gonada; gonada of reproductive system of female organism; ovum-producing ovary; gonad of female organism reproductive system;
Uberon related term : ovaries;
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 : Ovaries of some kind are found in the female reproductive system of many animals that
employ sexual reproduction, including invertebrates. However, they develop in a very
different way in most invertebrates than they do in vertebrates, and are not truly
homologous. Many of the features found in human ovaries are common to all vertebrates,
including the presence of follicular cells, tunica albuginea, and so on. However,
many species produce a far greater number of eggs during their lifetime than do humans,
so that, in fish and amphibians, there may be hundreds, or even millions of fertile
eggs present in the ovary at any given time. In these species, fresh eggs may be developing
from the germinal epithelium throughout life. Corpora lutea are found only in mammals,
and in some elasmobranch fish; in other species, the remnants of the follicle are
quickly resorbed by the ovary. In birds, reptiles, and monotremes, the egg is relatively
large, filling the follicle, and distorting the shape of the ovary at maturity. Amphibians
and reptiles have no ovarian medulla; the central part of the ovary is a hollow, lymph-filled
space. The ovary of teleosts is also often hollow, but in this case, the eggs are
shed into the cavity, which opens into the oviduct. Although most normal female vertebrates
have two ovaries, this is not the case in all species. In birds and platypuses, the
right ovary never matures, so that only the left is functional. In some elasmobranchs,
the reverse is true, with only the right ovary fully developing. In the primitive
jawless fish, and some teleosts, there is only one ovary, formed by the fusion of
the paired organs in the embryo;
Origin ID : 0000992;
UMLS CUI : C0029939;
Automatic exact mappings (from CISMeF team)
- Ovary [ICD-11 Extension code]
- Ovary [ICNP localization]
- Ovary [ICHI extension code]
- Ovary [ICHI extension code]
- Semantic type(s)
- UMLS correspondences (same concept)
- Ovary [ICNP localization]
- Uberon cross reference
- develops from
- has part
- part of
the gonad of a female organism which contains germ cells
