The body has two adrenal glands, one near the top of each kidney. The inner part (medulla) of the adrenal glands secretes hormones such as adrenaline (epinephrine) that affect blood pressure, heart rate, sweating, and other activities...

Practice for the MCAT by answering these questions based on the given table showing results from two control groups.

Suitable for upper elementary and up, this is a thorough explanation of what alcohol does to the body and nervous system. Includes information about fetal alcohol syndrome and links to further information.

Observable coordinated responses to stimuli. Originates with genes that direct the formation of tissues and organs of the animal body (nervous & endocrine systems).

Study all about the biology of the body's specialized tissues called organs. Also organ systems including nervous, digestive, respiratory, endocrine, and circulatory on this site.