Transport system : structure and composition of blood

Describe the circulatory system

The circulatory system is a system of blood vessels with a pump and valves to ensure one-way flow of blood

Identify red and white blood cell in photomicrographs and diagrams

List the components of blood

55% plasma, the fluid part of blood.
45% is made up of blood cells and platelets.

State the function of red blood cells 

Red blood cells transport oxygen around the body from lungs to cells which is required for aerobic respiration

State the function of white blood cells 

Defend the body against infections by pathogens by carrying out phagocytosis and anti body production

State the function of platelets

Help blood clot

State the function of plasma

To transport carbon dioxide, digested food, urea, mineral ions, hormones and heat energy,