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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.

Which of the following statements regarding bronchial tubes is not true?