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This hormone is responsible for male secondary sex characteristics:

This innermost layer of the heart prevents blood clots from forming:

By convention, blood pressure is most commonly measured at this artery:

Idenfiy this chamber: ;

This artery, the largest in the body, distributes oxygenated blood to all organ systems:

Cardiac output is the amount of blood pumped by the left ventricle in one minute.  It is equal to stroke volume multiplied by heart rate.

Veins have valves to prevent pooling of blood in the legs.  

Which of the following arteries does NOT provide oxygenated blood to the myocardium:

Which of the following is FALSE regarding hormones:

The electrical signal that causes the heart to contract is initiated by the: