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FMA. 7209. Anatomical terminology. [edit on Wikidata] The ovary (from Latin ōvārium 'egg, nut') is a gonad in the female reproductive system that produces ova; [1] when released, an ovum travels through the fallopian tube / oviduct into the uterus. There is an ovary on the left and the right side of the body.
Female birds in most families have only one functional ovary (the left one), connected to an oviduct — although two ovaries are present in the embryonic stage of each female bird. Some species of birds have two functional ovaries, and the kiwis always retain both. [81] [82] Birds do not have male accessory glands. [83] Most male birds have no ...
The egg cell or ovum (pl.: ova) is the female reproductive cell, or gamete, [1] in most anisogamous organisms (organisms that reproduce sexually with a larger, female gamete and a smaller, male one). The term is used when the female gamete is not capable of movement (non- motile). If the male gamete (sperm) is capable of movement, the type of ...
The oviduct in vertebrates is the passageway from an ovary. In human females, this is more usually known as the fallopian tube. The eggs travel along the oviduct. These eggs will either be fertilized by spermatozoa to become a zygote, or will degenerate in the body. Normally, these are paired structures, but in birds and some cartilaginous ...
The female lays amniotic eggs in which the young fetus continues to develop after it leaves the female's body. Unlike most vertebrates, female birds typically have only one functional ovary and oviduct. [19] As a group, birds, like mammals, are noted for their high level of parental care.
Most female birds have a single ovary and a single oviduct, both on the left side, [96] but there are exceptions: species in at least 16 different orders of birds have two ovaries. Even these species, however, tend to have a single oviduct. [96]
The mammalian female reproductive system contains three main divisions: the vagina and uterus, which act as the receptacle for the sperm, the ovaries, which produce the female's ova, and the vulva, which mainly consists of the labia and clitoris. The vagina, uterus and ovaries are always internal while the vulva is external.
The ovary is differentiated into a central part, the medulla of ovary, covered by a surface layer, the germinal epithelium. The immature ova originate from cells from the dorsal endoderm of the yolk sac. Once they have reached the gonadal ridge they are called oogonia. Development proceeds and the oogonia become fully surrounded by a layer of ...