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Biology 20 Circulatory system Exam Questions and Answers
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Biology 20 Circulatory system Exam Questions and Answers
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Biology 20: Circulatory system ExamQuestions and Answers
Main functions of the circulatory system. - Answers -1. transport gases.
2. regulate body temperature.
3. protect the body against disease and infection.
The heart. - Answers -Organ that pumps blood though out the body.
Blood vessels - Answers -Serves as the road ways though which the blood moves.
The blood. - Answers -Carries nutrients, O2, CO2, water, wastes and other materials
though out the body.
Atria. (single atrium) - Answers -They fill with blood returning either from the body of the
lungs.
Ventricles. - Answers -Receives blood from the atria and pumps it either to the lungs or
body.
Septum. - Answers -Muscle that separates the right and left sides of the heart to prevent
O2 rich blood from mixing with O2 poor blood.
Vena cava. - Answers -Receives blood coming back from the body.
Superior vena cava. - Answers -Receives oxygen poor blood from upper body and
collects in right atrium.
Inferior vena cava. - Answers -Receives oxygen poor blood from lower body and
collects in the right atrium.
pulmonary trunk. - Answers -Blood from the right atrium travels though the right
ventricle and then pumped into the pulmonary trunk.
pulmonary arteries. - Answers -blood from the pulmonary trunk gets pumped though the
pulmonary arteries. Then the arteries send oxygen poor blood to the lungs.
Pulmonary veins - Answers -Take oxygen rich blood from the lungs and collects in the
left atrium.
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