Worn-out red blood cells are removed from circulation by the ________ and ________.

A. kidneys; thymus gland
B. spleen; kidneys
C. liver; kidneys
D. liver; spleen


Answer: D

Anatomy & Physiology

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The first recognizable feature of the cardiovascular system is (the)

A) heartbeat at birth. B) formation of blood cells in the liver. C) heartbeat at five months. D) development of the aorta at two months. E) None of the answers are correct

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Which is NOT true regarding antibodies?

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Sound signals are carried from the ear to the brain by the optic nerve.

Answer the following statement true (T) or false (F)

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