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The process of red blood cell production is called:

The SA Node is:

Which substance can diffuse directly through the cell membrane of the capillary endothelium?

 Which of the following is not matched correctly:

Which artery would have the largest diameter?

Atrial __________ is to atrial relaxation as atrial __________ is to atrial contraction.

Given an end diastolic volume (EDV) of 120 ml / beat and an end systolic volume (ESV) of 50 ml / beat, the stroke volume (SV) would be ________.

Which of the following factors increases cardiac output? 

Which layer of the wall of the heart is the deepest?

Plasma accounts for about _____ of the blood volume and __________ account for about 10% of  the plasma.