* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download 11. 1 Heart Anatomy and Functions of the Cardiovascular System
Survey
Document related concepts
Cardiovascular disease wikipedia , lookup
Electrocardiography wikipedia , lookup
Heart failure wikipedia , lookup
Management of acute coronary syndrome wikipedia , lookup
Coronary artery disease wikipedia , lookup
Antihypertensive drug wikipedia , lookup
Arrhythmogenic right ventricular dysplasia wikipedia , lookup
Artificial heart valve wikipedia , lookup
Myocardial infarction wikipedia , lookup
Quantium Medical Cardiac Output wikipedia , lookup
Cardiac surgery wikipedia , lookup
Mitral insufficiency wikipedia , lookup
Atrial septal defect wikipedia , lookup
Lutembacher's syndrome wikipedia , lookup
Dextro-Transposition of the great arteries wikipedia , lookup
Transcript
Chapter 11: The Cardiovascular System Lesson 11.1 Heart Anatomy and the Function of the Cardiovascular System Anatomy and the Function of the Cardiovascular System Section topics (overview) • the heart: location and size • the four chambers of the heart • the heart valves • blood flow through the heart • walls of the heart • cardiac cycle • cardiac output © Goodheart-Willcox Co., Inc. Permission granted to reproduce for educational use only. The Heart: Location and Size • • • • • Thoracic cavity - beneath the sternum Above diaphragm – sits on the top of the diaphragm Between lungs – apex (point) tilted left (toward hip) Size of a clenched fist Weighs – 10 – 12 ounces (males) – 8 – 10 ounces (females) © Goodheart-Willcox Co., Inc. Permission granted to reproduce for educational use only. The Heart: Location and Size © Goodheart-Willcox Co., Inc. Permission granted to reproduce for educational use only. The Four Chambers of the Heart 1. right atrium 2. right ventricle S e p t u m 3. left atrium 4. left ventricle © Goodheart-Willcox Co., Inc. Permission granted to reproduce for educational use only. The Heart Valves • Atrioventricular (AV) valves (between Atria & Ventricles) – Tricuspid (right side) – bicuspid (mitral) (left side) • Semilunar valves (between ventricles and arteries) – pulmonary – aortic © Goodheart-Willcox Co., Inc. Permission granted to reproduce for educational use only. Blood Flow through the Heart • (1) deoxygenated blood flows from the body to the inferior and superior vena cavae to right atrium • (2) right atrium contracts, forcing blood through the tricuspid valve to right ventricle • (3) right ventricle contracts, forcing blood through the pulmonary valve, to the pulmonary artery • (4) blood exits to the lungs © Goodheart-Willcox Co., Inc. Permission granted to reproduce for educational use only. Blood Flow through the Heart (continued) • (5) oxygenated blood from lungs travels through the pulmonary veins to the left atrium • (6) left atrium contracts, forcing blood through the mitral valve to the left ventricle • (7) left ventricle contracts, forcing blood through the aortic valve • (8) blood passes to the aorta • (9) blood travels out to parts of the body © Goodheart-Willcox Co., Inc. Permission granted to reproduce for educational use only. Blood Flow through the Heart © Goodheart-Willcox Co., Inc. Permission granted to reproduce for educational use only. Walls of the Heart • epicardium – outermost layer – Coronary arteries located • myocardium – – – – middle layer 66% of cardiac muscle Contracts 72- 82 beats/m Pumps through 60,000 miles of vessels • endocardium – inner layer – Lines the chambers and covers the valves © Goodheart-Willcox Co., Inc. Permission granted to reproduce for educational use only. Cardiac Cycle • diastole – ventricle relax, atria contract • systole – ventricles contract, atria relax • mean arterial pressure – overall pressure within cardiovascular system © Goodheart-Willcox Co., Inc. Permission granted to reproduce for educational use only. Cardiac Output • amount of blood pumped by heart in 1 minute measured in liters/minute • stroke volume – amount of blood pumped in 1 beat • heart rate – number of beats per minute © Goodheart-Willcox Co., Inc. Permission granted to reproduce for educational use only.