Arteries and Arteriole

Question 1

What are arterioles?

Answer 1

= arteries branch to narrow blood veseels arterioles
= carry blood to the capillaries in each organ

Question 2

What are arteries and how do they transpirt blood away from the heart?

Answer 2

= carry blood away from the heart to the organs
= high pressure
= when heart beats a surge of high pressure blood passes through ateries even between htese beats

Question 3

What is the structure of the arteries?

Answer 3

smooth muscle: contracts and diameter of artery narrows- controls how much blood flows to different organs

= thick wall: witstand high pressure
= outer layer: made from collagen, structural role and strengthens artery wall in pressure

elastic fibesL elastic:
= elastuc fibres stretch as surges moves through and recoil when past, keeps blood moving smoohlt in between contracts of heart

lumen: where blood flows through, lined with endothiluem cells, smooth surface to reduce friction

Question 4

What do arterioles do?

Answer 4

= deliver blood to capillaries
= contains same layers as arteries

blood pressure is LOWER and effect of pulse is weaker

= collagen rich layer and elastic layer is thin
= smooth muscle is thicker arterioles involve controlling amoint of blood passing through cappilaries- when cintracts blood flow is reduced , relaxes blood flow increases- vasodilation when organs require increased amoint og oxygen
= vasoconstrictio