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Longitudinal section through the left side of the scrotum and the left testis (seminiferous tubules visible in center, but not labeled). Seminiferous tubule (transverse section). Photomicrograph of section through rat testis, showing seminiferous tubules.
Placenta with attached fetal membranes (ruptured at the margin at the left in the image), which consists of the chorion (outer layer) and amnion (inner layer).. The part of the chorion that is in contact with the decidua capsularis undergoes atrophy, so that by the fourth month scarcely a trace of the villi is left.
Vocal Bird anatomy: Birds produce sounds through the air that passes through the Syrinx, which is shown close up in the bottom right. In order for birds to produce sound, they use an organ located above the lungs called the syrinx , which is composed of tracheal rings, syringeal muscles, Tympaniform membrane, and internal bony structures that ...
A 3D model of an egg. Most bird eggs have an oval shape, with one end rounded and the other more pointed. This shape results from the egg being forced through the oviduct. Muscles contract the oviduct behind the egg, pushing it forward. The egg's wall is still shapeable, and the pointed end develops at the back. [citation needed]. One ...
More realistic size. Add vulva, clitoris, muscles and bones, bulb of vestibule, parametrium-broad ligament, round ligament, suspensory ligament of ovary, blood vessels. Better draw (specially Fallopian tubes and vagina). Hemifrontal cross section. Add vulva label. Add transparency of left ovary and infundibulum of Fallopian tube (they are ...
This list of related male and female reproductive organs shows how the male and female reproductive organs and the development of the reproductive system are related, sharing a common developmental path. This makes them biological homologues. These organs differentiate into the respective sex organs in males and females.
The domestic turkey (Meleagris gallopavo domesticus) is a large fowl, one of the two species in the genus Meleagris and the same species as the wild turkey.Although turkey domestication was thought to have occurred in central Mesoamerica at least 2,000 years ago, [1] recent research suggests a possible second domestication event in the area that is now the southwestern United States between ...
Drawing of the head of a four-week-old human embryo. From Gray's Anatomy. Embryo drawing is the illustration of embryos in their developmental sequence. In plants and animals, an embryo develops from a zygote, the single cell that results when an egg and sperm fuse during fertilization. In animals, the zygote divides repeatedly to form a ball ...