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DHO Unit 6:8 Anatomy and Physiology Circulatory System
Copyright © 2004 by Thomson Delmar Learning. ALL RIGHTS RESERVED.2 6:8 Circulatory System AKA the cardiovascular system Consists of heart, blood vessels, and blood Transports oxygen and nutrients to body cells Transports carbon dioxide and metabolic materials away from the body cells
Copyright © 2004 by Thomson Delmar Learning. ALL RIGHTS RESERVED.3 Heart Muscular, hollow organ functions as pump Size of a closed fist Location –Slightly to the left of the sternum –Between the 4 th and 5 th intercostal
Heart Exterior and Interior Copyright © 2004 by Thomson Delmar Learning. ALL RIGHTS RESERVED.4
Anatomy Heart chambers –Right Atrium –Right Ventricle –Left Atrium –Left Ventricle Septum Valves –Tricuspid –Pulmonary –Mitral –Aortic Copyright © 2004 by Thomson Delmar Learning. ALL RIGHTS RESERVED. 5
Layers of the Heart Endocardium Innermost Layer Myocardium Thickest Layer Pericardium Membrane that covers the heart Copyright © 2004 by Thomson Delmar Learning. ALL RIGHTS RESERVED.6
7 Blood Vessels Blood carried throughout body in blood vessels –Arteries –Capillaries –Veins
Blood Vessel Disection Copyright © 2004 by Thomson Delmar Learning. ALL RIGHTS RESERVED.8
Blood Flow Through the Body (Systemic Circulation) Copyright © 2004 by Thomson Delmar Learning. ALL RIGHTS RESERVED.9
Blood Flow Normal Blood Flow Through the Heart Double Click this link to go to the National Institute of Health’s page to see how normal blood flow looks and sounds …. Be patient! Give it a second to load. Copyright © 2004 by Thomson Delmar Learning. ALL RIGHTS RESERVED.10
Taking Your Pulse When your heart pumps blood through your arteries, it creates a pulse that you can feel on the arteries close to the skin's surface. For example, you can feel the pulse on the artery inside of your wrist, below your thumb. You can count how many times your heart beats by taking your pulse. You will need a watch with a second hand (or look at the clocks above each door!). To find your pulse, gently place your index and middle fingers on the artery located on the inner wrist of either arm, below your thumb. You should feel a pulsing or tapping against your fingers. Watch the second hand and count the number of pulses you feel in 30 seconds. Double that number to find out your heart rate or pulse for 1 minute. The usual resting pulse for an adult is 60 to 100 beats per minute. To find your resting pulse, count your pulse after you have been sitting or resting quietly for at least 10 minutes. Copyright © 2004 by Thomson Delmar Learning. ALL RIGHTS RESERVED.11
Copyright © 2004 by Thomson Delmar Learning. ALL RIGHTS RESERVED.12 Blood Average adult: 4-6 quarts Blood circulates continuously throughout the body Transports many substances Plasma Blood cells –Erythrocytes or red blood cells –Leukocytes or white blood cells –Thrombocytes
Copyright © 2004 by Thomson Delmar Learning. ALL RIGHTS RESERVED.13 Diseases and Abnormal Conditions Arteriosclerosis and Atherosclerosis
Copyright © 2004 by Thomson Delmar Learning. ALL RIGHTS RESERVED.14 More Diseases and Abnormal Conditions Anemia Aneurysm Arrhythmias Congestive heart failure (CHF) Embolus Hemophilia Hypertension Leukemia Myocardial infarction – heart attack Phlebitis Varicose veins
6:9 Lymphatic System Removes waste and excess fluid from the tissues –Lymph –Lymphatic vessels –Lymph nodes –Lymphatic ducts –Lymph tissue –Spleen –Thymus The lymphatic system is part of the circulatory system, comprising a network of lymphatic vessels that carry a clear fluid called lymph (from Latin lympha meaning water) directionally towards the heart. Copyright © 2004 by Thomson Delmar Learning. ALL RIGHTS RESERVED.15
Lymphatic and Venous Systems Working Together Copyright © 2004 by Thomson Delmar Learning. ALL RIGHTS RESERVED.16
Copyright © 2004 by Thomson Delmar Learning. ALL RIGHTS RESERVED.17 Diseases and Abnormal Conditions Adenitis Hodgkin’s disease Lymphangitis Splenomegaly Tonsillitis
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