cardiovascualr system

Question 1

what does the cardiovascular system transport

Answer 1

blood

Question 2

what are the two types of vessels in the system

Answer 2

oxygen-rich blood vessels

carbon dioxide-rich vessels

Question 3

what are the three categories of blood vessels

Answer 3

capillaries
arteries
veins

Question 4

what is the job of the arteries

Answer 4

they deliver oxygen-rich blood from the heart to the parts of the body

Question 5

why are arteries thicker than veins

Answer 5

cause they need to withstand more pressure because the blood coming from the heart is pumped at a high rate

Question 6

what is the job of the capillaries

Answer 6

exchanges between blood and cells happen through the capillaries

Question 7

what is the job of veins

Answer 7

they carry oxygen-poor blood back to the heart

Question 8

why do veins have valves

Answer 8

so the blood does not move in the wrong direction

Question 9

why are the walls of the capillaries so thin

Answer 9

so they are permeable and the gas exchange can happen