urorectal fold
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urorectal septum — the caudally and outwardly growing wedge of endoderm covered mesoderm that divides the cloaca into the urogenital sinus and rectum, and the cloacal outlet into the urogenital orifice and anus; called also urorectal fold and cloacal s … Medical dictionary
fold — 1. A ridge or margin apparently formed by the doubling back of a lamina. SYN: plica. 2. In the embryo, a transient elevation or reduplication of tissue in the form of a lamina … Medical dictionary
membrane — 1. A thin sheet or layer of pliable tissue, serving as a covering or envelope of a part, as the lining of a cavity, as a partition or septum, or to connect two structures. SYN: membrana [TA]. 2. SYN: biomembrane. [L. membrana, a skin or m … Medical dictionary
Septum — A word borrowed from the Latin "saeptum" meaning a "dividing wall or enclosure." * * * 1. [TA] A thin wall dividing two cavities or masses of softer tissue. See septal area, transparent s.. 2. In fungi, a wall; usually a cross … Medical dictionary
Cloaca — A common passageway for feces, urine and reproduction. At one point in the development of the human embryo, there is a cloaca. It is the far end of a structure called the hindgut. This structure then divides to form a rectum, a bladder, and… … Medical dictionary
Mesentery — Horizontal disposition of the peritoneum in the lower part of the abdomen. The mesentery is marked with red … Wikipedia
Dorsal mesentery — Abdominal part of digestive tube and its attachment to the primitive or common mesentery. Human embryo of six weeks … Wikipedia
Hymen — This article is about the vaginal mucous membrane fold. For the god and other uses, see Hymen (disambiguation). Hymen External genital organs of female. The labia minora have been drawn apart. Latin hymen vaginae … Wikipedia
Embryology — 1 morula, 2 blastula 1 blastula, 2 gastrula with blastopor … Wikipedia
