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Biology : Human Circulation


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1.

During the atrial systole, the openings of the pulmonary vein and the vena cava are _______.

  open

  closed

 

2.

The _______ of the heart pumps the blood up to the lungs only.

  right ventricle

  left ventricle

  left auricle

  right auricle

  Half-n-half Clue
 

3.

The left auricle of the heart receives _______ blood from the lungs.

  oxygenated

  deoxygenated

 

4.

Plasma is a constituent of blood.

  True

  False

 

5.

When the auricles of the heart contract, the ventricles relax, and vice versa.

  True

  False

 

6.

The process of circulation of blood in the heart begins with the _______ of the auricles of the heart.

  contraction

  relaxation

 

7.

During the atrial systole, the atrial muscles _______.

  contract

  relax

 

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