circulation

Question 1

one heart beat

Answer 1

sends blood through both systemic and pulmonary circuits

Question 2

layers of vessels

Answer 2

-intima, media and adventita

Question 3

intima

Answer 3

endothelium and connective tissue

Question 4

media

Answer 4

smooth muscle

Question 5

adventitia

Answer 5

support the shape and have collagen/ elastic fibers

Question 6

vasoconstriction

Answer 6

sympathetic nervous system
-r and d
-constricts sooth muscle/ media

Question 7

walls of the vessels are too thick?

Answer 7

vasa vasorum (blood supply soly to supply the vessels w nutrients)

Question 8

Arteries vs veins

Answer 8

-arteries have thicker walls, maintain circular shape, folds in the inima and end at continuous capillaries
-venules will collapse if cut and end at fenestrade capillaries

Question 9

fenestrated capillaries

Answer 9

have pores, endotherlium and basal lamina

Question 10

continuous capillaries

Answer 10

endothelium and basal lamina

Question 11

diameter of capillaries

Answer 11

8 microns

Question 12

capillary diffusion types

Answer 12

-diffusion
-pores
-endocytosis
-gaps in the cell linnings

Question 13

where do capillaries lead

Answer 13

capillary beds

Question 14

capillary beds

Answer 14

capillary network of vessels that connect arterioles and venules

Question 15

collateral arteries

Answer 15

-brain heart and tummy
-places that have multiple artery supply and if one gets a clot its fine

Question 16

capillaries are what kind of cell?

Answer 16

simple squamous epithelium

Question 17

what anastomosis do collateral arties form?

Answer 17

arteriole anastomosis

Question 18

Second type of anastomosis?

Answer 18

-arterioventricular anastomosis at places where movement hinders blood flor and there is a direct connection between arterioles and venules (joints and organ)

Question 19

artery decreasing in size

Answer 19

elastic artery-> muscular artery-> arteriole

Question 20

layers of venules

Answer 20

endothelium and adventitia

Question 21

arterioles

Answer 21

-media, endotherlium and basal lamina

Question 22

elastic artery

Answer 22

has elastic in the intima

Question 23

venous valves

Answer 23

help blood flow against gravity and if they dont close you get varicose veins

Question 24

vein blood volume

Answer 24

60-70%
-distend 8x more than arteries

Question 25

artery blood volume

Answer 25

30-35%