Transport - capillaries, Arteries, Veins

Question 1

Arteries function

Answer 1

Transport blood away from the heart under high pressure

Question 2

Capillary function and steps

Answer 2

Connects the Arteries and Veins and is the site of gas exchange. Materials are diffused out of the blood and into the tissues. The blood picks up the waste products and the waste is diffused in the capillary.

Question 3

Fluids and capillary

Answer 3

fluids (h2o, o2, glucose) exit the capillary and flow between tissues. They produce wastes that diffuse back into the capillary.

Question 4

three features of arteries

Answer 4

High pressure caused by the narrow lumen.

contraction/recoil due to the thick muscular wall. The walls contract to keep force of blood through vessels.

Elastic/strong, collagen + elastic fibres in wall, maintain structure to not burst.

Question 5

Narrow lumen function

Answer 5

maintain high-pressure

Question 6

Thick walls with collagen function

Answer 6

expand, contract and with stand high-pressure without bursting

Question 7

Elastic fibres function

Answer 7

help provide recoil to push blood through vessel

Question 8

Muscular walls function

Answer 8

contract to push blood through

Question 9

Explain high pressure in artery

Answer 9

walls of the arteries is pushed outward which widen the lumen, stretching elastic fibres in wall. this store is potential energy.

Question 10

explain pressure fall in artery

Answer 10

elastic fibers, recoil + squeeze blood and lumen, pushing flow forward

Question 11

basement membrane in capillaries

Answer 11

Act as a filter

Question 12

pores in capillaries

Answer 12

allow for part of plasma to leak and form tissue fluid.

Question 13

function of veins

Answer 13

Collect blood from organs and transport through capillary networks back to heart under low pressure

Question 14

explain overall pressure in vessels

Answer 14

Blood exiting the heart is under very high pressure, travels in waves and pulses. once blood reaches capillaries, it is under very low pressure, without pulse. Pressure is 0MMHG once in veins.

Question 15

explain overall velocity

Answer 15

Blood is under very high speed going through the artery, once it reaches the capillary it is under very low speed. This is due to the decrease of the diameter in the capillary. Once blood exits the capillary and in the vein it is under high speed again.