Biology Revision :) (:

Notes for B5,B6 (Hope this helps)

• Insects have open circulatory system.
• Humans have closed circulatory systems.

Thrombosis - when blood clots abnormally inside undamaged blood vessels.

Anticoagulant drugs can be used to reduce blood clotting, ie. warafin, aspirin.

Haemophillia - inherited disease - blood fails to clot due to a faulty clotting protein.

Gas exchange must be carried out to release energy from by food by aerobic respiration.

Sweating:

- excess water and salt are excreted from sweat glands onto the surface of the skin.   - The water is then  evaporated , which cools our skin down.

Oestrogen is released by the ripening egg which stimulates the uterus lining to thicken and also stimulates the release of LH.

Infertility treatments are :

• surrogacy
• IVF
• Artificial Insemination
• egg donation
• …