vitelline canal
31Hernia — A general term referring to a protrusion of a tissue through the wall of the cavity in which it is normally contained. More specifically, a hernia often refers to an opening or weakness in the muscular structure of the wall of the abdomen. This… …
32Digenea — For the bird genus, see Anthipes. Digenea Helicometra sp. (Plagiorchiida: Opecoelidae) from the intestine of a Flame Cardinal fish Scientific classification …
33flatworm — /flat werrm /, n. any worm of the phylum Platyhelminthes, having bilateral symmetry and a soft, solid, usually flattened body, including the planarians, tapeworms, and trematodes; platyhelminth. [1895 1900; FLAT1 + WORM] * * * or platyhelminth… …
34Ductus arteriosus — Artery: Ductus arteriosus Plan of the fetal circulation. ( Ductus arteriosus visible at upper right.) …
35Ductus venosus — Vein: Ductus venosus Fetal circulation. The ductus venosus (red) connects the umbilical vein to the inferior vena cava …
36Foramen ovale (heart) — Not to be confused with ostium secundum. Foramen ovale (heart) Sketch showing foramen ovale in a fetal heart. Red arrow shows blood from the inferior caval vein. HF: right atrium, VF: left atrium. HH og VH: right and left ventricle. The heart… …
37Embryogenèse — Premiers stades de l embryogenèse ; divisions successives par mitose de la cellule œuf L embryogenèse est le processus de formation d un organisme pluricellulaire, végétal ou animal, de la cellule œuf issue de la rencontre des gamètes… …
38human embryology — ▪ biology Introduction the process encompassing the period from the formation of an embryo, through the development of a fetus, to birth. The human body, like that of most animals, develops from a single cell produced by the union of… …
39reproductive system, animal — Introduction any of the organ systems by which animals reproduce. The role of reproduction is to provide for the continued existence of a species; it is the process by which living organisms duplicate themselves. Animals compete with… …
40fistula — An abnormal passage from one epithelial surface to another epithelial surface. [L. a pipe, a tube] abdominal f. a fistulous passage connecting one of the abdominal viscera …
