| A | B |
|---|
| acardia | lack of a heart |
| anaerobic | in the absence of oxygen |
| abnormal | departing from normal |
| acoustics | the science of sound |
| acrodermititis | inflammation of the skin |
| adorbital | toward the orbit |
| adeniform | resembling a gland in shape |
| aerobic respiration | oxygen requiring metabolism |
| afferent neurons | carry impulses to the central nervous system |
| agonistic and antagonistic | oppose each other |
| corpus albicans | white scar tissue |
| alimentary canal | digestive tract |
| alleles | alternative expressions of a gene |
| amphibian | organism capable of living on land or in water |
| anaphase | when chromosomes separate |
| arteriovenous anastomosis | a connection between an artery and a vein |
| aortic aneurysm | a weak spot on the aorta that causes enlargement of the vessel |
| angiitis | inflammation of the walls of a small vessel |
| angina pectoris | a choked feeling in the chest sue to dysfunction of the heart |
| anticoagulant | substance that prevents blood clotting |
| antecubital | before the elbow |
| aorta | largest artery |
| apex | tip of the heart |
| appendicular skeleton | attached to the trunk |
| aqueous solution | made primarily of water |
