embryo sac cell
111Human gastrointestinal tract — Alimentary canal redirects here. For animal alimentary canal in general, see Gut (anatomy). Human gastrointestinal tract (Digestive System) Stomach colon rectum diagram The human gastrointestinal tract refers to the stomach a …
112Sexual reproduction — is the creation of a new organism by combining the genetic material of two organisms. The two main processes are: meiosis, involving the halving of the number of chromosomes; and fertilization, involving the fusion of two gametes and the… …
113Umbilical cord — of a three minute old child. A medical clamp has been applied. Latin funiculus umbilicalis Code …
114Ascidiacea — Taxobox fossil range=fossil range|0|0|earliest=Silurian|text=Recent (but see text) name = Ascidiacea image width = 250px image caption = Halocynthia sp. regnum = Animalia phylum = Chordata subphylum = Urochordata classis = Ascidiacea classis… …
115Vitelline veins — The liver and the veins in connection with it, of a human embryo, twenty four or twenty five days old, as seen from the ventral surface. (Vitelline veins visible at center bottom.) Gray s …
116Vesicle — In dermatology, a vesicle is a small blister, as on the skin. Vesicles also occur on the mucous membranes, such as the buccal mucosa (the lining of the mouth). Vesicles are less than .5 centimeters in diameter.In anatomy, a vesicle is any small… …
117Metamorphosis — This article is about the biological process. For other uses, see Metamorphosis (disambiguation). A dragonfly in its final moult, undergoing metamorphosis from its nymph form to an adult. Metamorphosis is a biological process by which an animal… …
118African clawed frog — Scientific classification Kingdom: Animalia Phylum …
119genetic disease, human — Introduction any of the diseases and disorders that are caused by mutations in one or more genes (gene). With the increasing ability to control infectious and nutritional diseases in developed countries, there has come the realization …
120Placenta — For the ancient Roman bread, see placenta (food). For the placenta of fruit, see placentation. Placenta Placenta Precursor …
