Textbook Notes (362,896)
Canada (158,081)
HLTC22H3 (102)
Anna Walsh (49)
Chapter 6

Health and Aging reading notes chapter 6

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University of Toronto Scarborough
Health Studies
Anna Walsh

Health, Illness, and Optimal Aging Chapter 6 Cardiovascular System Basic Anatomy and Physiology -cardiovascular system is the bodys main transportation system -sends supplies like fluids, nutrients, hormones, oxygen, and antibodies to the tissue in the body while at the same time removing waste products such as carbon dioxide and hydrogen ions -composed of the heart, blood vessels, and blood -arteries carry blood away from the heart and veins carry blood to it -blood is a fluid composed of red, and white blood cells, -heart enclosed by pericardium -the left side and right side of the heart each 2 upper chambers (atria) which collect blood, and the 2 lower chambers (ventricles) which pump blood to the lungs and the rest of the body -oxygen poor blood is collect in the right atrium from the large veins of the body, the superior and inferior vena cava -oxygen rich blood is sent via the pulmonary veins to the left atrium from where it flows to the left ventricle and is pumped out through the aorta -contraction of the heart called systole and relaxation diastole -only arteries reflect the heart beat Age-Related Changes -enlargement of the heart mass with age due to increase in size of muscle cells -pacemaker cells decrease to 10% by the age of 75 -capillaries become narrower which impedes blood flow Disease Related Processes Hypertension -systolic hypertension increases throughout life whereas diastolic pressure tends to level off in later years Arteriosclerosis and Atherosclerosis -arteriosclerosis refers to the thickening and loss of elasticity of arterial walls which leads to increase in blood pressure which can lead to hypertension -atherosclerosis is a type of arteriosclerosis (the most common form) -atherosclerosis causes a disruption in blood supple -risk factors for both are being male, having family history, smoking, diet high in saturated fat, diabetes, hypertension, obesity, and leading a sedentary life Peripheral Vascular Disease -arteries to the legs and feet are partially or completely blocked due to atherosclerosis, resulting in a decrease in the supply of oxygen and nutrients Coronary Heart Disease -leading cause of heart disease in the old -women less likely to be diagnosed -risk factors include smoking, high blood pressure, high cholesterol, being overweight, and having a sedentary life -can lead to heart attack Heart Failure -heartbeat stops -no longer able to pump blood to meet metabolic needs of the bodys tissues www.notesolution.com
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