The pituitary gland is sometimes referred to as the master gland.

The circadian rhythm is the body’s 24-hour clock.

The abbreviation K+ stands for potassium.

Blood typing is a test to determine how many of each type of leukocyte a person has.

A person with Rh+ blood has the Rh factor on his or her red blood cells.

Which structure is not part of the renal corpuscle?

Patent is a term that means open.

External respiration refers to the exchange of oxygen and carbon dioxide between:

Tracheotomy is a procedure that makes it easier for the patient to breathe.

The islets of Langerhans are the exocrine sections of the pancreas.