Physiology 2130 Lecture Notes - Lecture 8: Superior Vena Cava, Pulmonary Valve, Mitral Valve
25 May 2016
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Module 8: the heart | page 1 of 7. Will beat about 2. 5 billion times over a lifetime. Have 160,000 km (100,000 miles) of blood vessels. Functions of cardiovascular system: transport oxygen and nutrients to all cells of the body, transport carbon dioxide and waste products from cells, helps regulate body temperature and ph, transports and distributes hormones and other substances within the body. Heart consists of two side-by-side pumps: right atrium and ventricle which pumps blood to lungs, and left atrium and ventricle which pumps blood to the rest of the body. Prevent av valves from being pushed into the atria when ventricle pressure is high: papillary muscles: extensions of the ventricular muscles that are attached to chordae tendineae. Contract when the ventricles contract to hold the av valves in place (prevents then from folding backward into the atria) Module 8: the heart | page 2 of 7.
