A&p Second Test Blood Vessels

Front 1

arteries

Back 1

thicker, withstands greater pressure, regulates blood distribution by adjusting diameter

-carry blood away

Front 2

veins

Back 2

-withstands low pressure

-veins have semilunar valves for blood to return back to the heart

-carries blood toward heart

Front 3

pulmonary circuit

Back 3

circuit where:

-arteries carry low o2 blood

-veins carry high o2 blood

Front 4

systemic circuit

Back 4

circuit where:

-arteries carry high o2 blood

-veins carry low o2 blood

Front 5

tunica adventitia

Back 5

thin connective tissue wrapping outside the vessel(more veins than arteries)

Front 6

tunica media

Back 6

thick middle layer of smooth muscle

-much thicker in an artery

-thinner in veins

Front 7

tunica intima

Back 7

innermost layer that has simple epithelium in both arteries and veins

Front 8

subendothelial

Back 8

connective tissue that is much thinner in veins than in arteries

Front 9

internal elastic lamina

Back 9

only found in arteries- elastic connective tissue

Front 10

muscular arteries

Back 10

tunica medias made almost entirely of smooth muscle

-important for adjusting bp with constriction and dilation

Front 11

arterioles

Back 11

very small vessels of the artery's

Front 12

capillaries

Back 12

no muscle or connective tissue

-just squamous epithelium tissue

Front 13

what are the three types of capillaries?

Back 13

sinusodial

fenustrated

continuous

Front 14

fenestrated capillaries

Back 14

have small pores that allow easier filtration and diffusion

Front 15

sinusoidal capillaries

Back 15

intentionally leaky with gaps between cells

Front 16

continuous capillaries

Back 16

have only small slits that allow things to escape form the blood

Front 17

capillary beds

Back 17

-local control

-determines whether blood fills capillaries or passes through

Front 18

venules

Back 18

drains the capillaries bed and merge to form veins in the body

Front 19

semilunar valves in veins

Back 19

are there to prevent backflow of blood

Front 20

muscular pump

Back 20

allows muscular constriction and breathing to push venous blood back toward the heart

Front 21

systolic

Back 21

pressure exerted on the walls of the arteries at peak of ventricular contraction/ejection

Front 22

diastolic

Back 22

lower pressure in the arteries- when heart is filling with blood

Front 23

baroreceptors

Back 23

located near aorta and carotid arteries to detect bp changes and signal the medulla

Front 24

cardiac center

Back 24

when bp is to low, cc will increase heart rate, thus increasing cardiac output

Front 25

vasomotor center

Back 25

sned impulses to smooth muscle of blood vesels when necessary for vasoconstriction and raise bp

Front 26

shock

Back 26

when bp slows so much that cells all over body including major organs begin to die

-example of positve feedback