This is a short summary of the paper
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The Circulatory System
Start of Term Paper
is the course taken by the blood through the
arteries, capillaries, and veins and back to the heart. In humans, the
heart is made up of four chambers the right and left auricles, or atria,
and the right and left ventricles. The right side of t .... Middle of Term Paper
... an opening into the right ventricle.
When this contracts the ventricle drives the blood to the lungs. Blood is
prevented from returning into the auricle by the tricuspid valve, which
completely closes during contraction of the ventricle. In its passage
through the lungs, the blood is oxygenated, then it is brought back to the
heart by the four pulmonary veins, which enter the left auricle. When this
chamber contracts, blood is forced into the left ventricle and then by
ventricular contraction into the aorta. The bicuspid, or mitral valve
prevents the blood from flowing back into the auricle, and the semilunar
valves at the beginning of ... |
| Number of Words: 1335 |
Approximate Pages: 5 |
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