Components of the blood

Question 1

Components of the blood include:

Answer 1

Plasma
White blood cells
Red blood cells
Platelets

Question 2

Red blood cells

Answer 2

Red blood cells carry oxygen from our lungs to our tissues

Question 3

Why is oxygen transport efficient

Answer 3

This is because:
There are huge numbers of red blood cells
The cells are so tiny to allow them pass through narrow capillaries
They have a flattened disc shape to increase surface area to allow rapid oxygen diffusion
They contain haemoglobin which absorbs oxygen in the lungs

Question 4

White blood cells

Answer 4

White blood cells can engulf bacteria and other pathogens by phagocytosis
They can change shape easily and produce enzymes that digest pathogens

Question 5

Platelets

Answer 5

Platelets are small fragments of cells
They are involved in forming clots where there is a wound

Question 6

Plasma

Answer 6

Plasma is a straw-coloured liquid
It transports dissolved substances around the body, including:
Hormones
Antibodies
Nutrients
Waste products