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Blood (Blood has four parts : plasma, red blood cells, white blood cells…
Blood
Blood has four parts : plasma, red blood cells, white blood cells and platelets.
Plasma:
Is the liquid part of blood.
Transports foods, salts, hormones, waste and heat.
Red blood cells (erythrocytes)
Are made in bone marrow such as ribs breast bone, the long bones in the arms and legs and the vertebrae of the backbone.
Contain haemoglobin.
Carry oxygen.
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Haemoglobin:
Gains oxygen in the lungs, forming oxyhaemoglobin.
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The human blood groups are:
O, A, B, AB
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Blood clots have two main functions
They reduce the loss of blood.
They prevent the entry of micro-organisms.
Leukaemia is a form of cancer in which the white blood cells are produced too rapidly and are immature.
They crowd out other blood cells and may cause anaemia.
The main functions of blood are:
Transport (food waste products and hormones by plasma)
Body defence-againist disease
Transport of heat from internal organs by plasma. To help to maintain a constant body temperature.
Transport of oxygen by red blood cells.