the blood

Question 1

plasma

Answer 1

liquid part of the blood containing platelets, white blood cells and red blood cells

Question 2

what does the plasma transport?

Answer 2

digestion products
(small intestine -> other organs)

CO2
(organs -> lungs)

urea
(liver -> lungs)

Question 3

what do red blood cells transport

Answer 3

oxygen from the lungs to body cells

Question 4

adaptations of red blood cells

Answer 4

haemoglobin:
binds to oxygen making oxyhaemoglobin, which is released in the organs as haemoglobin and oxygen

no nucleus:
more room for haemoglobin

biconcave disc (dimples in center):
greater surface area for oxygen to diffuse more rapidly

Question 5

what do white blood cells do?

Answer 5

form part of the immune system like making antibodies

Question 6

what is the key feature of white blood cells?

Answer 6

nucleus which contains DNA codes the instructions they need to do their job

Question 7

platelets

Answer 7

tiny fragments of cells that help blood to clot