part of
part of
develops_from
female reproductive system
gonad
female gonad
(...) 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]
AAO:0000371
BILA:0000125
BSA:0000080
BTO:0000975
CALOHA:TS-0730
EFO:0000973
EHDAA2:0001360
EHDAA:8124
EMAPA:17962
EV:0100111
Either of paired female reproductive organs involved in production of ova and female sex hormones.[AAO]
FBbt:00004865
FMA:7209
Female reproductive organ.[TAO]
GAID:367
MA:0000384
MESH:D010053
MIAA:0000125
OpenCyc:Mx4rvVi9QJwpEbGdrcN5Y29ycA
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
TAO:0000403
UBERON:0000992
UMLS:C0029939
VHOG:0000251
XAO:0000258
ZFA:0000403
female organism genitalia gonad
female organism genitalia gonada
female organism reproductive system gonad
female organism reproductive system gonada
female reproductive system gonad
female reproductive system gonada
genitalia of female organism gonad
genitalia of female organism gonada
gonad of female organism genitalia
gonad of female organism reproductive system
gonad of female reproductive system
gonad of genitalia of female organism
gonad of reproductive system of female organism
gonada of female organism genitalia
gonada of female organism reproductive system
gonada of female reproductive system
gonada of genitalia of female organism
gonada of reproductive system of female organism
ovarian
ovaries
ovarium
ovary
ovum-producing ovary
reproductive system of female organism gonad
reproductive system of female organism gonada
the gonad of a female organism which contains germ cells
uberon
female reproductive organ
indifferent gonad