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 2574316 Across 1. Has 4 chambers. (5) 4. Fight infection and defend the body against microorganisms. (5, 5, 5) 5. prevents back flow of blood (6) 6. Clot togetherat injury site to prevent blood loss. (9) Down 2. Have a biconcave shape to increase surface area and take up more oxygen, (3, 5, 5) 3. Pumps blood to the rest of the body (5) 7. A liquid that transports nutrients around the body. (6)
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