How Is It Possible to Have Two Separate Circulatory Systems

question 15

Multiple Choice

How is it possible to have two separate circulatory systems (pulmonary and systemic) ?

• A) The pulmonary arteries and veins reverse their function at the heart so that the pulmonary veins carry oxygenated blood and the pulmonary arteries carry deoxygenated blood.
• B) The heart is really two separate pumps; circulation to the lungs needs one pump, whereas circulation to the body needs a separate pump.
• C) The two systems are separate to prevent mixing of oxygenated and deoxygenated blood, which would cause the oxygen level to drop too low.
• D) The two systems are not truly separate; circulation of a specific sample of blood to the lungs occurs only after it has traveled through the body. It is one continuous system.

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Definitions:

British Surrender

The act of British forces giving up in a conflict, notably referring to events like the 1781 surrender at Yorktown during the American Revolutionary War.

Battle of Saratoga

A major battle during the American Revolutionary War in 1777, considered a turning point as it resulted in a decisive victory for the American forces and led to France entering the war as an American ally.

British Defeat

Generally refers to significant military or strategic losses suffered by the British forces, notably in the American War of Independence.

Patrick Henry

An American attorney, planter, and orator best known for his declaration to the Second Virginia Convention (1775): "Give me liberty, or give me death!"