Circulatory System (1)

Circulatory System (1) - The Circulatory System The...

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Unformatted text preview: The Circulatory System The Circulatory System Chapter 37 Section 1 Notes Notes Keys Keys Lecture Outline Circulatory System PowerPoint Notes textbook questions Functions of the Functions of the Circulatory System Circulatory System Brings blood containing oxygen, nutrients, and hormones to cells Transports CO 2 and other wastes away from cells Fights infection Regulates body temperature Helps stabilize pH and ionic concentration of body fluids. Functions Continued Circulatory System Components Heart Blood Vessels Arteries Veins Capillaries The Heart A muscular pump Moves blood through the body Is suspended in the pericardial sac Composed of four chambers Divided into right and left halves Made up of cardiac muscle cells Aorta Left pulmonary artery Left atrium Left pulmonary veins Left ventricle Superior vena cava Right pulmonary veins Right atrium Right ventricle Inferior vena cava Pericardium Protective sac of connective tissue Surrounds the heart Filled with fluid Myocardium The muscle of the heart Strong and thick Composed of spontaneously contracting cardiac muscle fibers Can conduct electricity like nerves Its blood supply comes from the coronary arteries Myocardium (heart muscle) shown in red Epicardium (Outer surface of myocardium) Endocardium (Inner surface of myocardium) Structures of the Heart Chambers Atria- (2) upper chambers Thin walled Receive blood from veins Send blood to ventricles Ventricles-(2) lower chambers Thick walled Receive blood from atria Pump blood out through arteries Septum Wall that divides heart into right and left halves Septum Pulmonary valve Right atrium Tricuspid valve Right ventricle Left atrium Aortic valve Mitral valve Left ventricle Structures of the Heart Valves Prevent backflow of blood Keep blood moving in one direction Between the chambers At junctions of artery and chamber Tricuspid valve Pulmonary veins Mitral valve Left atrium Pulmonary valve Aortic valve Right atrium Valves seen from above Chordea tendinea Pulmonary valve Structures of the Heart Chordae tendinease Heart strings Cord-like tendons Connect papillary muscles to tricuspid and mitral valves Prevent inversion of valve Papillary muscles Small muscles that anchor the cords Papillary muscle aortic valve left common carotid artery left subclavian artery brachiocephalic artery right pulmonary artery septum left pulmonary artery aorta pulmonary trunk left pulmonary veins left atrium (auricle) mitral valve pulmonary valve papillary muscle left ventricle right pulmonary veins superior vena cava right atrium tricuspid valve right ventricle inferior vena cava 2006 Merriam-Webster, Inc....
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This note was uploaded on 11/09/2011 for the course BIO 110 taught by Professor Harmon during the Winter '11 term at BYU.

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Circulatory System (1) - The Circulatory System The...

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