heart and blood vessels

Question 1

what is the circulatory system made up of?

Answer 1

arteries, veins, capillaries and the
heart

Question 2

how are arteries specialised?

Answer 2

with thick elastic walls and a small lumen

Question 3

how are capillary walls specialised?

Answer 3

only one cell thick, so there is a short distance for diffusion

Question 4

how are veins specialised?

Answer 4

valves, thinner and less elastic walls and a larger lumen

Question 5

what does the main structure of the heart include?

Answer 5

the aorta, vena cava, pulmonary artery, pulmonary vein, valves, atria and ventricles

Question 6

what is heart rate controlled by?

Answer 6

a group of cells that act as a pacemaker

Question 7

where are pacemaker cells located?

Answer 7

in the right atrium

Question 8

what does blood contain?

Answer 8

red blood cells, white blood cells, platelets and plasma

Question 9

what do red blood cells carry?

Answer 9

oxygen

Question 10

what is the function of white blood cells?

Answer 10

destroy pathogens

Question 11

what is the function of platelets?

Answer 11

clot the blood

Question 12

what is plasma?

Answer 12

the liquid part of blood