Category: A

The ridgelike lateral walls of the entrance to the larynx.  

The folded edge of the inner fetal membrane where it rises over and finally encloses the embryo of birds, reptiles, and some mammals.  

A fluoride compound used to prevent dental caries, available in solution and gel. It has often been used by dental professionals as a cariostatic agent.  

Clear, pale, straw-colored fluid occurring in ascites. The fluid is normally sterile; its specific gravity is normally 1.005 to 1.015; the cellular content is less than 250 white blood cells per cubic millimeter, and its protein content is low. Cancer, heart failure, liver failure, peritonitis, and tuberculosis may alter the amount or character of ascites.…

Fluid found in the fetal membrane that develops from the yolk sac.  

The sharp forward bend at the anorectal junction as the rectum passes through the pelvic diaphragm muscles. This acute bend, which is normally maintained by the puborectalis sling muscles, helps to keep feces in the rectum. During defecation the pelvic diaphragm muscles relax (so the puborectalis sling relaxes) and the sharp bend between rectum and…

A flap of skin used to cover the end of a part left after an amputation.  

In the spinal cord, the groove that runs along the ventral midline.  

The space or distance from the individual within which he or she hears sounds.  

A nerve fiber that carries sensory impulses to the central nervous system from receptors in the periphery.