vein structure- lqc 2b

Question 1

outer collagen coat/ connective tissue

Answer 1

strength

Question 2

valves

Answer 2

to prevent back flow of blood

Question 3

thin smooth muscle layer

Answer 3

less constriction of vein needed

Question 4

thin elastic fibre layer

Answer 4

Less elastic recoil needed, as blood is moved by the contraction of skeletal muscles

Question 5

smooth endothelium

Answer 5

reduces resistance to blood flow

Question 6

wide lumen

Answer 6

reduces resistance to blood flow, to prevent low pressure blood slowing down