Module 3.4Notes - Module 3.4 Cardiovascular System...

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Module 3.4: Cardiovascular System Functions of Cardiovascular System,circulation of blood throughout body = transports nutrients and ane exchanges oxygen for carbon dioxide. Removes carbon dioxide and other metabolic waste from tissues. Distributes hormone secretions from the endocrine glands, transports immune system components(cells and antibodies), helps regulate body temp, maintains ph and fluid balace of bodily tissue. Albumin= important for maintain blood volume and pressure accounts for 60 to 80 perecent of blood proteins, glovulins- responsible for transporting immune cells and enzymes. Fibrogen- responsible for formation of blood clots Blood = bodys only fluid connective issue, 5l of blood inside body which makes up 7-8% of body weight, thick as water, 38 degree celecius, heme/hemato=blood,emia= blood conditions, hypovolemia= low blodd volume hypervolemia-high blood volume, blood- 55% plasma(pale yellow part of blood 91% water, 2% solutes nutirents electrolytes, hormones,blood gases. 7% proteins)45% formed elements Erythrocyte Disorders – Rbc’s, Cardiac Anatomy - • An average adult heart is approximately the size of two fists. •It takes about as much force as squeezing a tennis ball to contract theheart.•Even at rest, the muscles of the heart work twice as hard as the leg muscles of a person sprinting.•The heart beats about: •100,000 times per day •35 million times per year•2.5 billion times over the course of 70 years. • The heart is located near the center of the thoracic cavity between the lungs and is contained in the periodical sac.•The broad end, or base,of the heart is also partially supported by large arteries and veins.•The pointed end, or apex,of the heart is directed toward the abdomen.•The pericardium is a loose fitting, double layered sac designed to:•Supports the weight of the heart and roots of the great (large) blood vessels. • prevents frictionfrom damaging the heart or lungs as theheart beats. Comprised of 3 layers: The outside The inner layer filled with pericardial fluid– onelayer attaches to the outside connective tissue, the other is a part of the heart wall. The Heart Wall •The fibrous pericardium is the most superficial layer, made up of dense connective tissue.•The parietalpericardium is the inner layer of the pericardium, which secretes pericardial fluid to prevent friction.•The visceralpericardium - is a smooth membrane on the surface of the heart.•The Myocardium is the actual cardiac muscle tissue layer.•The endocardium is the inner most layer of the heart, consisting of endothelial cells which cover the heart valves and lines the blood vessels. The Chambers of the Heart
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•In mammals and birds, the heart is divided into a right and left side and each side is divided into an atrium and a ventricle.•Therefore, the heart is said to have four chambers. •When viewed Anteriorly you mostly see the right ventricle.•When viewed Posteriorly
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This note was uploaded on 01/12/2012 for the course KIN 173 taught by Professor Staff during the Fall '11 term at Michigan State University.

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Module 3.4Notes - Module 3.4 Cardiovascular System...

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