Biology B4

Question 1

What is plasma: percentage, function and structure

Answer 1

55% of the blood
Pale yellow and mostly made up of water and dissolved substances. It is the liquid part of the blood.
It transports many different substances around your body e.g: digested food, gases, water and waste

Question 2

What are red blood cells: percentage, structure, function

Answer 2

45%
Very small disc shape ( biconcave ), no nucleus so there is more space for haemoglobin. Contain haemoglobin ( red pigment that binds oxygen
Transports oxygen to all body cells for respiration via the haemoglobin binding with oxygen to form oxyhaemoglobins

Question 3

What are platelets: percentage, structure, function

Answer 3

Less than 1%
Made up of tiny fragments of cells and have no nucleus
They cause blood to clot