ANSC 323 Study Guide - Midterm Guide: Mitral Valve, Tricuspid Valve, Intercalated Disc

• School: McGill University
• Department: Animal Science
• Course: ANSC 323
• Professor: Sarah Kimmins

Document Summary

Waste from cells -> liver or kidney. Oxygen from luungs -> all cells, co2 back to lungs. Move antibodies, hormones, take away heat -> skin: pulmonary (lungs) circulation low resistance, lower pressure, systemic circulation high pressure & resistance. Encased in percardium, (filled w/ fluid for lubrication) Path for blood: vc -> thru tricuspid valve -> ra -> thru semilunar valve-> pa -> to lungs -> pv -> La -> bicuspid valve -> lv -> semilunar valve -> aorta (highest pressure) One way flow (control by valves) held shut by chordae tendonae. Left ventricle is thicker muscle (pump into high resistance system) Resistance cause by: friction w/ blood vessel walls: affected by blood viscosity, diameter of blood vessel, affects blood pressure, pressure: aorta > arteries > capillaries > veins> vena cavae. Pacemakers: (autocontractile cells): generate own action potential (does not stay @resting potential)-> pass signal to contractile cells (continue passing thru intercalated disks (gap junc)