Growth and Development of different organisms

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Blood By the end of the lesson you should be able to:

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Growth and Development of different organisms National 5 Biology Key Area 6: The Need for Transport (b) Animal Transport Systems National 4 Biology Key Area 4 Growth and Development of different organisms

By the end of this lesson you will be able to .... Give examples of substances transported in the blood Explain how a red blood cell is specialised for it’s function.

The Blood Nutrients, oxygen, carbon dioxide and hormones are transported in the blood.

Function To transport oxygen around the body Specialisation Large surface area for oxygen transport Biconcave shape Contains a haemoglobin which binds with oxygen

Red Blood Cell Function: To transport oxygen around the body. Biconcave in shape (large surface area) No nucleus (more space for haemoglobin) Contains haemoglobin which binds to oxygen to form oxyhaemoglobin. Oxyhaemoglobin then loses it’s oxygen to body cells. Haemoglobin + oxygen oxyhaemoglobin