Anatomy & Physiology I Heart Notes

Anatomy & Physiology I Heart Notes - 1 The...

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1. Where are all the valves of the heart located? There are four valves in total. The atriuventricular valves (AV) are the tricuspid and bicuspid valves. The bicuspid valve is  located between the left atrium and left ventricle. The tricuspid valve is located between the right  atrium and right ventricle.  The semilunar valves (SL) are the aortic and pulmonary valves. The aortic valve (entrance to  aorta) is the left-sided pumping chamber on the heart, allowing blood to leave the left ventricle.  The pulmonary valve (entrance to pulmonary trunk) is the right sided pumping chamber on the  heart, allowing blood to leave the right ventricle.  2. When do the valves of the heart open?   When do they close? The valves of the heart open and close in response to pressure changes in the heart chambers.  When the ventricle is relaxed the SL valves are closed and the AV valves are open. When the  ventricles contract, the SL valves are open and the AV valves close.  3. What is the function of the chordae tendineae? Chordae tendineae are tendon like structures that do not stretch past point where AV flaps meet,  preventing the AV valves from everting into the atria as they close. 
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4. Be able to identify which atrium receives deoxygenated blood and which atrium  receives oxygenated blood and which blood vessels carry the blood to each atrium? The right atrium receives deoxygenated blood from the superior vena cava, inferior vena cava, 
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This note was uploaded on 09/27/2010 for the course BIOL 109 taught by Professor Siddiqui during the Summer '03 term at Bergen Community College.

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Anatomy & Physiology I Heart Notes - 1 The...

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