The limbic system plays an important role in emotion and the formation of memories. Several structures comprise the limbic system, including the hippocampus, hypothalamus and amygdala. More »

The University of Washington explains that the endocrine system secretes hormones and other substances into the blood stream in order to control behavioral processes, such as responses to stress. Additionally, the endocr... More »

Neuroscience for Kids states that smoking affects the nervous system by causing an increase in blood pressure, heart rate and respiration as well as constriction of arteries and stimulation of the central nervous system.... More »

Goose bumps are tiny bumps on the skin that appear as a result of cold, shock or emotion. The bumps are formed by an involuntary contraction of the muscles under the hairs of the skin, which causes body hair to stand up ... More » Science Human Anatomy

"Visceral" means "coming from emotion rather than from reason." A "gut feeling," for example, can be described as a "visceral feeling." The word comes from the Latin root "viscera," which literally means "internal organs... More »

The heart was left in a deceased Egyptian because it was thought to store the person's personality, emotion and memory. It was the only major organ left in the body at the time of mummification. More »

Kidneys are the site of filtrate formation. According to John W. Kimball, a retired biology professor from the University of Harvard, nephrons in the kidneys produce urine by filtering the blood of small impurities and p... More » Science Human Anatomy