Unit 16 Study Questions

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Biomedical Physio & Kines
BPK 142
Craig Asmundson

LAB #7–C ARDIO RESPIRATORY A NATOMY Atria  two small upper cavities of the heart from which blood is passed to the ventricles  The right atrium receives deoxygenated blood from veins  The left atrium receives oxygenated blood from the pulmonary vein Ventricles  two large lower chambers that collect and expel blood received from an atrium towards the lungs or body  The right ventricle pumps blood into the pulmonary circulation for the lungs  The left ventricle pumps blood into the systemic circulation through the aorta o Thicker walls than the right ventricle because it needs to pump blood to most of the body Describe the flow of a red blood cell from the right atrium to the aortic arch, identifying the major structures along the way, and the function associated with each structure.. 1. Deoxygenated blood enters the right atrium viasuperior/inferior vena cava 2. Flows through the tricuspid valve into the right ventricle 3.  beats  ventricle pushes blood through thepulmonic valve into the pulmonary artery 4. Pulmonary artery carries the blood to the lungs where it gets oxygenated then leaves the lungs 5. Returns to th through the pulmonary vein 6. Blood enters the left atrium 7. Descends through the bicuspid valve into the left ventricle 8. Left ventricle then pumps blood through the aortic valve into the aorta 9. Blood then goes through the aorta to the rest of the body Superior vena cava – carries deoxygenated blood from the upper body to the right atrium Inferior vena cava – carries deoxygenated blood from the lower body to the right atrium Tricuspid valve – a flap-like structure that ensures 1-way blood flow from the right atrium to the right ventricle Pulmonic valve – flap-like structure ensuring 1-way blood flow from the right ventricle to the pulmonary artery Pulmonary artery – transports deoxygenated blood from the right ventricle to the lungs Pulmonary vein – transports oxygenated blood from the lungs to the left atrium ***Veins carry blood TO the heart, while arteries carry blood AWAY from the heart. Discuss the importance of the elasticity and contractility of the arteries. Elasticity of arteries helps smooth out large fluctuations in blood pressure created by the heartbeat  Systole  large arteries distend with blood as their elastic walls stretch  Diastole  walls rebound and thus pushing blood along  Large arteries such as the aorta and its branches (brachiocephalic, subclavian, pulmonary, beginning of common carotid and iliac) are the most elastic. The smooth muscle wall of the artery regulates bl
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