BIOLOGY

FUNCTIONHelps keep your body at the RIGHT

TEMPERATURECarries HORMONES to the body cellsSENDS ANTIBODIES to fight infectionContains CLOTTING FACTORS to clot blood and

the bodies tissue to HEALTransport OXYGEN and NUTRIENTS throughout

the bodyRemove waste materials such as CARBON DIOXIDE

Fluid part of blood & Carries carbon dioxide, hormones and waste

Contain haemoglobin which carries oxygen &

Made in the bone marrow. The more you train the more red

blood cells are made.

Important part of the immune system, they produce antibodies and

destroy harmful micro organisms

Clump together form clots & Protect the body by stopping bleeding

The heart pumps blood out through one main artery called the dorsal aorta. The main artery then divides and branches out into many smaller arteries so that each region of your body has its own system of arteries supplying it with fresh, oxygen-rich blood.

Veins receive blood from the capillaries after the exchange of oxygen and carbon dioxide has taken place. Therefore, the veins transport waste-rich blood back to the lungs and heart. It is important that the waste-rich blood keeps moving in the proper direction and not be allowed to flow backward. This is accomplished by valves that are located inside the veins. The valves are like gates that only allow traffic to move in one direction

Unlike the arteries and veins, capillaries are very thin and fragile. The capillaries are one epithelial cell thick. The exchange of oxygen and carbon dioxide takes place through the

thin capillary wall. The red blood cells inside the capillary release their oxygen and take

in carbon dioxide and waste products