Biology Revision :) (:

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  • Created by: Helen
  • Created on: 01-06-11 16:48

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.


- 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


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