BIOA01H3 Study Guide - Midterm Guide: Atherosclerosis, Rhabdomyolysis, Angina Pectoris

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BIOA01H3 Full Course Notes
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BIOA01H3 Full Course Notes
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Document Summary

In heart, pulmonary arteries take deoxygenated blood out. In heart, pulmonary veins bring oxygenated blood in. Capillaries: smallest vessels, one cell thick, used for gas exchange. Sphincter: muscle that controls the flow of blood in the capillary bed. Heart -> arteries -> arterioles (smaller arteries) -> capillaries -> venules (smaller veins) -> Heart: muscle organ left side of chest cavity under sternum. Right ventricle pumps blood through arteries to lung. Cardiac cycle: pumping and filling of blood in the heart, takes 0. 8 seconds. Ventricles contract and push blood out of heart, atria starts to refill. Right ventricle contracts and blood moves to the lung. Controls rate of heart: influenced by brain or hormones. Receives signals from brain, and sends it to av node. Connects to the perkinje fibres and bundle of his to contract ventricle. Delays to ensure atria is empty and that ventricles contract together. Cardiac output: volume of blood pumped in 1 min.

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