Cardiovascular System

Front 1

components of the cardiovascular system

Back 1

heart, blood vessels and blood (plasma and cellular components)

Front 2

structure of tri- and bicuspid valves

Back 2

1. papillary muscles
2. chordae tendineae
3. "flaps" 3 right and 2 left

Front 3

heart sounds during systole (contraction)

Back 3

-atrial contraction followed by ventricular contraction
-lubb sound from closing of tri- and bicupid valves
-blood ejected into aorta, pulminary trunk, and expanding arteries.

Front 4

heart sounds during diastole (relaxation)

Back 4

-atria and ventricles relax
-dupp sounds heard as blood tries to return to ventricles.
-both aortic and pulmonary semilunar valves close

Front 5

3 tunics of arteries

Back 5

tunica intima-endothelium, basement membrane, elsatic lamina
tunica media-elastic and smooth muscle fibers
tunica externa-elastic and collagenous

Front 6

elastic arteries

Back 6

tunica media w/ MORE elastic and LESS smooth muscle
swell during heart contractions and keep blood moving in relaxation
ex. aorta, pulmonary trunk, brachiocephalic artery

Front 7

muscular arteries

Back 7

medium sized, tunica media with MORE smooth muscle and LESS elastic fibers
ex. radial, femoral arteries

Front 8

anastomosis

Back 8

junction of 2 or more vessles supplying the same body region
may occur b/t vein, arterioles and venules

Front 9

arterioles

Back 9

small arteries that deliver bloos to capillaries.
some branch to give rise to metarterioles w/ few, scattered smooth muscle cells (pericytes)
-empty into a venule

Front 10

blood capillaries

Back 10

connect arterioles w/ venules
most have precapillary sphicters
form beds
fenestrated

Front 11

continuous capillaries`

Back 11

endothelial cells connected by tight junctions and desmosomes

Front 12

sinusoids

Back 12

microscopic blood vessles
wider and more tortous w/ larger pores and thinner basement membrane
in liver, bone marrow, and adrenal glands

Front 13

venules

Back 13

small veins that collect blood from capillaries and drain into veins.

Front 14

veins

Back 14

carry blood to the heart
3 tunicas externa is thickest

Front 15

blood pressure
veins vs. arteries

Back 15

much less pressure in veins than arteries

Front 16

result of repeated overloading of veins

Back 16

walls stretch and lose elasticity.
varicose veins and hemmoroids (varicosities in anal cavity due to strain)

Front 17

vena cavae

Back 17

large veins
superior and inferior vena cavfa (incompletely guarded by semilunar crescent of tissue serving as a valve)
function-dump deoxyginated blood into right atrium.

Front 18

new flashcard

Back 18

no answer