Components of blood

Question 1

Explain 2 ways that red blood cells are
adapted for efficient gas exchange.

Answer 1

Biconcave shape which increases surface area.
Very small so can fit through narrow capillaries.

Question 2

What is the main structural difference between a red blood cell and a white blood cell?

Answer 2

Red blood cells do not contain a nucleus but white blood cells do contain a nucleus.

Question 3

What is the main function of platelets?

Answer 3

Platelets cause blood to clot.

This stops blood pouring out of wounds and stops pathogens getting in.