11. How does the heart impel
the blood?

Gap-fill exercise

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The heart is muscular organ that
chambers (right atrium
right ventricle and atrium and right
) through which blood .
The blood enters heart in the ,
goes to the and then leaves
organ.

The blood pumped out of heart by
the of the muscle that
form the walls.The
contraction reduces ventricle
volume thus the internal
pressure the blood then to the
exitvessels ( artery for the
ventricle and aorta the left
ventricle). ventricular muscle
fibers the ventricles regain
original size and new blood flow
from the atria.