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OVERVIEW OF HEART ANATOMY The heart contains these main components: 1) 4 Chambers: These muscular compartments contract to pump blood. 2) 3) OVERVIEW OF HEART ANATOMY The heart contains these main components: 1) 4 Chambers: These muscular compartments contract to pump blood. 2) Vessels: These tubes conduct and direct the flow of blood toward and away from the heart. 3) OVERVIEW OF HEART ANATOMY The heart contains these main components: 1) 4 Chambers: These muscular compartments contract to pump blood. 2) Vessels: These tubes conduct and direct the flow of blood toward and away from the heart. 3) 4 Valves: These flaps help prevent the backflow of blood through the heart in order to keep it moving in one direction. OVERVIEW OF HEART ANATOMY The heart contains these main components: 1) 4 Chambers: These muscular compartments contract to pump blood. 2) Vessels: These tubes conduct and direct the flow of blood toward and away from the heart. 3) 4 Valves: These flaps help prevent the backflow of blood through the heart in order to keep it moving in one direction. OVERVIEW OF HEART ANATOMY • Blood must flow through all of these components in order to be pumped through the heart. • Let’s take a closer look at the components. OVERVIEW OF HEART ANATOMY arteries to head & arms ascending aorta superior vena cava pulmonary trunk right pulmonary arteries left pulmonary arteries right semilunar valve left pulmonary veins right pulmonary veins left atrium right atrium left A.V. valve left semilunar valve right A.V. valve right ventricle left ventricle inferior vena cava descending aorta OVERVIEW OF HEART ANATOMY arteries to head & arms ascending aorta superior vena cava right pulmonary arteries right semilunar valve right pulmonary veins right atrium right A.V. valve right ventricle inferior vena cava pulmonary trunk left pulmonary arteries left pulmonary veins left atrium left A.V. valve left semilunar valve left ventricle descending aorta THE PATHWAY OF BLOOD THROUGH THE HEART • The center of the heart contains a thick muscular wall called two halves the _______ septum which divides the heart into __________. THE PATHWAY OF BLOOD THROUGH THE HEART • The center of the heart contains a thick muscular wall called two halves the _______ septum which divides the heart into __________. The RIGHT Side of the Heart • It receives deoxygenated ____________ blood from the upper _____ body and from the lower _____ body. • Then it sends the blood to lungs the right and left _____ to become oxygenated __________. = deoxygenated blood THE PATHWAY OF BLOOD THROUGH THE HEART • The center of the heart contains a thick muscular wall called two halves the _______ septum which divides the heart into __________. The LEFT Side of the Heart • It receives oxygenated __________ blood from the left and right lungs _____. • Then it sends the blood to upper body and to the the _____ lower _____ body. = deoxygenated blood = oxygenated blood DETAILS OF THE PATHWAY a) _____________ Deoxygenated blood from the upper body enters the heart through the superior ________________ vena cava and from the lower body through the inferior _______________. vena cava superior vena cava inferior vena cava DETAILS OF THE PATHWAY b) The deoxygenated blood is collected in the __________ right atrium which, when full, will pump the blood through the ____________. ___________________________ right atrioventricular (A.V.) valve to the right ventricle right atrium right A.V. valve right ventricle DETAILS OF THE PATHWAY c) When the right ventricle fills with deoxygenated blood, right semilunar valve which leads it will pump it through the __________________ up to the _______________. pulmonary trunk pulmonary trunk right semilunar valve DETAILS OF THE PATHWAY right d) The pulmonary trunk directs the blood to the left ___ and _____ _________________ pulmonary arteries which will lead the blood up to the _____ lungs to get oxygenated __________. right pulmonary arteries left pulmonary arteries DETAILS OF THE PATHWAY e) After picking up oxygen at the lungs, the oxygenated __________ blood will return to the heart through the left ___ and ______________ right pulmonary veins ____ which will deposit the blood into the _________. left atrium left pulmonary veins right pulmonary veins left atrium DETAILS OF THE PATHWAY f) When the left atrium is full of oxygenated blood, it pumps it left atrioventricular valve to the left through the ______________________ ___________. ventricle left A.V. valve left ventricle DETAILS OF THE PATHWAY g) When the left ventricle is full of oxygenated blood, it pumps left semilunar valve up to the the blood up through the _________________ ascending aorta ______________. ascending aorta left semilunar valve DETAILS OF THE PATHWAY arteries of the h) The ascending aorta takes oxygenated blood to ____________ head, neck and arms , and then curves downwards to form the _________________ _______________ descending aorta which takes the blood to the lower body. arteries to head & arms descending aorta DETAILS OF THE PATHWAY • Let’s recap the pathway for deoxygenated blood through the right side of the heart and oxygenated blood through the left side of the heart. Created by Anh-Thi Tang – Tangstar Science Copyright © April 2013 Anh-Thi Tang (a.k.a. Tangstar Science) All rights reserved by author. This document is for personal classroom use only. This entire document, or any parts within, may not be electronically distributed or posted to any website.