Chapter 11b Part 1 Cardiovascular Physiology – Structure of heart Heart location Anterior medial sternum In thoracic cavity between lungs 4 chambers 2 atria left and right 2 ventricles left and right Left ventricle is largest and strongest chamber in heart Have enough force to push blood through aortic valve into entire body blood vessels from right to left side Superior and inferior vena cava Aorta Pulmonary artery pulmonary Pulmonary veins (right and left side) Septum Wall of muscle which separates left and right atria and left and right ventricle Posterior region of heart Has 4 pulmonary veins 2 right pulmonary veins 2 left pulmonary veins Layers of the heart Pericardium thin membrane that covers heart covered by pericardium Underneath pericardium we have fat tissue Myocardium muscle which is underneath fat tissue Thickest layer Endocardium inside wall of heart Trabeculae carneae Muscular columns which project from inner surface of right and left ventricle Papillary muscle 3 in right ventricle and 2 on left ventricle Each papillary connected to chordae tendineae in right (3 chordae tendineae) and in left (2 chordae tendineae) Chordae tendineae Ligaments which connect papillary muscle to AV valve Chordae tendineae connect AV valves (atrioventricular valves) to papillary muscles In ventricles Heart Valves 4 types of valves Tricuspid (tri for 3 papillary muscle in right ventricle) Controls blood flow between right atrium and right ventricle Pulmonary valve Controls blood flow from right ventricle to pulmonary arteries Pulmonary arteries carry blood to your lungs and pick up O2 Pulmonary veins take blood from lungs to left atrium
Chapter 11b Part 1 – Cardiovascular Physiology Structure of heart Heart location Anterior medial sternum In thoracic cavity between lungs 4 chambers 2 atria left and right 2 ventricles left and right Left ventricle is largest and strongest chamber in heart Have enough force to push blood through aortic valve into entire body blood vessels from right to left side Superior and inferior vena cava Aorta Pulmonary artery pulmonary Pulmonary veins (right and left side) Septum Wall of muscle which separates left and right atria and left and right ventricle Posterior region of heart Has 4 pulmonary veins 2 right pulmonary veins 2 left pulmonary veins Layers of the heart Pericardium thin membrane that covers heart covered by pericardium Underneath pericardium we have fat tissue Myocardium muscle which is underneath fat tissue Thickest layer Endocardium inside wall of heart Trabeculae carneae Muscular columns which project from inner surface of right and left ventricle Papillary muscle 3 in right ventricle and 2 on left ventricle Each papillary connected to chordae tendineae in right (3 chordae tendineae) and in left (2 chordae tendineae) Chordae tendineae Ligaments which connect papillary muscle to AV valve Chordae tendineae connect AV valves (atrioventricular valves) to papillary muscles In ventricles Heart Valves 4 types of valves Tricuspid (tri for 3 papillary muscle in right ventricle) Controls blood flow between right atrium and right ventricle Pulmonary valve Controls blood flow from right ventricle to pulmonary arteries Pulmonary arteries carry blood to your lungs and pick up O2 Pulmonary veins take blood from lungs to left atrium
chapter-11b-part-1-cardiovascular-physiology.docx