the blood system

Question 1

name the four main chambers in the heart

Answer 1

top left-left atrium
top right- right atrium
bottom left- left ventricle
bottom right- right ventricle

Question 2

where does blood enter in the heart

Answer 2

atria

Question 3

what happens once the blood is in the atria

Answer 3

it is forced into the ventricles which contact and force blood out of the heart

Question 4

blood flows from the heart to the the organs through what and returns through what

Answer 4

it travels through arteries and returns through veins

Question 5

characteristics of an artery

Answer 5

thick walls containing muscles and elastic fibres to help push along the blood

Question 6

characteristics of veins

Answer 6

thinner walls and have valves to prevent back flow

Question 7

what are used to prevent arteries from narrowing

Answer 7

stents

Question 8

what does blood flow through in the organs

Answer 8

capillaries

Question 9

what happens in the capillaries

Answer 9

oxygen is diffused through the very thin walls into the bloodstream

Question 10

what is the heart made from

Answer 10

the wall is made from muscle tissue