B7 The blood and Heart 3.0 / 5 based on 2 ratings ? BiologyCells, tissues and organsGCSEOCR Created by: Cerys LawsCreated on: 13-06-13 11:47 Have a biconcave shape to increase surface area and take up more oxygen, Red Blood Cells 1 of 7 Fight infection and defend the body against microorganisms. White Blood Cells 2 of 7 Clot togetherat injury site to prevent blood loss. Platelets 3 of 7 A liquid that transports nutrients around the body. Plasma 4 of 7 Has 4 chambers. Heart 5 of 7 Pumps blood to the rest of the body Aorta 6 of 7 prevents back flow of blood Valves 7 of 7
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