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Cardiovascular system by: Jorge Velez (majors veins (thinner túnica media;…
Cardiovascular system by: Jorge Velez
major functions of the cardiovascular system
heart pumps blood
blood vessels circulate blood to all parts of body
delivers oxygen and nutrients to remove carbon dioxide and other waste products
anatomy of the heart
chambers
left atrium
receives blood from the lungs
right atrium
receives blood from the rest of the body
left ventricle
discharges blood to the rest of the body
right ventricle
discharges blood to lungs
valves
Atrioventricular valves
between syria and ventricles
Semilunar valves
between ventricle and atery
layers of the heart
myocardium
middle layer of the heart wall
epicardium
outer layer of the heart wall
endocardium
inner layer of the heart wall
major arteries
thickest layer( túnica media); small lumen( space the inside blood layer)
carry high pressure blood
blood moved by pumping action of the heart
majors veins
thinner túnica media; larger lumen
carry low pressure blood
blood moved “milking” action of muscles to help move blood
contains many mini valves to prevent backflow
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