exam Q's

Question 1

what are advantages of keeping blood inside vessels

Answer 1

-maintains high pressure of blood
-can increase rate of blood flow, how fast blood flows
-it can direct the flow of blood

Question 2

how are walls of arteries adapted to
-withstand pressure
-to maintain pressure

Answer 2

to withstand pressure =
-thick muscle wall made of collagen which provides strength
-endothelium is folded so can stretch

to maintain the pressure=
-smooth muscle and constrict and narrow the lumen
–elastic tissue can recoil