circulatory system Flashcards

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1
Q

what do blood vessels do

A

carry blood to and from the heart

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2
Q

what are arteries

A

carry blood away from the heart have very thick walls

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3
Q

what are the walls made of in arteries

A

outer connective tissue, then elastic and smooth muscle and then a endoclium lining

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4
Q

what are arterioles

A

smaller arteries

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5
Q

what are capillaries

A

smallest blood vessels, where exchange occurs

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6
Q

what do capillaries characteristic

A

only one layer of endothelial cells and have sphincters

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7
Q

what are venules

A

small veins that take blood back to the heart

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8
Q

veins are

A

thin walled vessels and have values to prevent back flow and skeletal muscle to push blood

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9
Q

what does the heat look like

A

cone shaped and sits between the lungs and slightly left has 4 chambers

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10
Q

what are the four chambers of the heart

A

right atrium, left atrium and right and left ventricle

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11
Q

what is the myocardium

A

major part of the heart muscle

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12
Q

what is the endocardium

A

the inner surface of the chambers

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13
Q

what is the pericardium

A

fibrous tissue covering the heart

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14
Q

what is the av valves

A

a valve that sits between the atrium and ventricle to prevent back flow

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15
Q

what does av valve mean

A

atrioventribular

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16
Q

what is the chordae tendinate

A

fibrous strings that support the valves

17
Q

what does the right side of the heart do

A

sends blood from the heart to the lungs and back

18
Q

what does the left side of the heart do

A

sends blood to the body and back