BIO 2135 Quiz: REPTILES and AVES Keywords
21 Oct 2015
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Document Summary
Air sacs: an air-filled space in the body of a bird that forms a connection between the lungs and bone cavities and aids in breathing and temperature regulation. Allantois: a membranous sac that develops from the posterior part of the alimentary canal in the embryos of mammals, birds, and reptiles. It is important in the formation of the umbilical cord and placenta in mammals. Amnion: a thin, tough, membranous sac that encloses the embryo or fetus of a mammal, bird, or reptile. It is filled with a serous fluid in which the embryo is suspended. Amniote egg: an amniote egg is an egg which has an amniotic sac in which the animal takes place. It resists drying out but permits oxygen and carbon dioxide to pass through. Anapsids: an amniote whose skull does not have openings near the temples, such as the turtle. Barb: one of the parallel filaments projecting from the main shaft of a feather.
