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34 terms

The cardiovascular system

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pericardium
protective sac of tissue that surrounds the heart
the central organ of the cardiovascular system
the heart
myocardium
thick layer of muscle in heart
septum
separates the heart vertically into 2 sides
atrium
upper chamber that receives blood; pumps to ventricle
ventricle
lower chamber that receives blood from atrium; pumps blood out of heart
valves
flaps of tissue that control the flow of fluid
tricuspid valve location
right side of heart
bicuspid (mitral) valve location
left side
function of semilunar valves
prevent back flow of blood into ventricles
back flow against AV valves creates the...
"lub" sound
back flow against the SL valves creates the...
"dup" sound
heart murmur
a defect in the valves of the heart allowing some back flow of blood
closed circulatory system
a circulatory system where blood is contained within the heart or blood vessels
carry blood away from the heart
arteries
only artery that carries oxygen poor blood
pulmonary artery
smallest blood vessel
vessel all diffusion takes place
slowest moving blood
capillary
blood pressure
the force created by the heart pumping blood through vessels
pulse
rhythmic stretching of arteries
ventricle contraction increases pressure
systolic pressure
relaxation of the heart
diastole (diastolic pressure)
hypertension
high blood pressure
plasma
sticky, straw- colored fluid (90% water), includes metabolites, nutrients, gases, hormones, wastes, salts, and proteins
only liquid tissue
blood
site of gas exchange in lungs
alveoli
walls of alveoli
one cell thick
the pulmonary circuit
carries blood between the heart and gas-exchange tissues
coronary circulation
systemic circulation that supplies blood to the heart itself
systemic circulation
carries blood to the heart and rest of the body
lowest pressured vessel
vein
vessel with greatest cross section (slowest)
capillaries
diameter of arteries are controlled by...
hormones
pressure and velocity are highest in which vessel?
aorta and arteries
capillaries are made of...
epithelial cells