Chapter_13_Cardiovascular_System

Chapter_13_Cardiovascular_System - Chapter 13...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
Chapter 13 Cardiovascular System Functions of the Circulatory System Transportation: ensure adequate blood flow through the capillaries to the various organs*** Respiratory: Transport . Nutritive : Carry absorbed digestion products. Excretory : Carry metabolic wastes to. Regulation: Hormonal: Carry hormones to target tissues to produce their effects. Temperature: . Protection: Clotting: Prevents blood loss. Immune: Leukocytes (antibodies and T cells), cytokines and complement fixation protect against pathogens. The Heart Four chambers 2 Atria 2 Ventricles Septum Interatrial Interventricular Base Apex Series Flow Through the Cardiovascular System Pulmonary circuit Supplied Blood vessels from heart to lungs and lungs to heart Systemic circuit Supplied Blood vessels from heart to systemic tissues and tissues to heart Oxygenation of Blood Pulmonary capillaries Blood entering lungs = Blood leaving lungs =
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Systemic capillaries Blood entering tissues = Oxygen diffuses Blood leaving tissues = Path of Blood Flow Through the Cardiovascular System Location of the Heart Clinical Aspect Pericarditis = inflammation of pericardium Cardiac Muscle Aerobic muscle No 99% 1% Hypertrophic Cardiomyopathy Genetic: 1:500 involves error in muscle proteins Leading cause of sudden death in young athletes Heartbeat Wave of contraction through cardiac muscle Atria contract as a unit Ventricles contract as a unit Atrial contraction precedes ventricle contraction Valves prevent backward flow Heart Valves Atrioventricular valves = AV valves Right AV valve = tricuspid valve Left AV valve = bicuspid valve = mitral valve Papillary muscles and chordae tendinae Keep AV valves from everting Semilunar valves Aortic Valve Pulmonary Valve leaves right ventricle
Background image of page 2
Heart Murmurs Abnormal heart sounds produced by abnormal patterns of blood flow in the heart. Defective heart valves: Valves become damaged by antibodies made in response to an infection (strep) Mitral stenosis : Mitral valve (bicuspid/left AV valve) becomes thickened and calcified Impair blood flow from left atrium to left ventricle Heart Murmurs Incompetent valves: Valves do not close properly. Blood regurgitates through the valve flaps
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 04/12/2010 for the course BIOL 2160 taught by Professor Kt during the Spring '08 term at LSU.

Page1 / 10

Chapter_13_Cardiovascular_System - Chapter 13...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online