Topic 1 (Lifestyle, Health & Risk) 0.0 / 5 ? BiologyU1 T1: Lifestyle, Health & RiskASEdexcel Created by: pippsicle96Created on: 09-02-14 17:19 10735296184 Across 1. Blood not containing oxygen is ____________ _______ (12, 5) 4. Veins contain _________ to help prevent the backflow of blood (6) 5. Small veins (7) 7. Blood vessel walls also contain ______ ______ to allow them to stretch (7, 6) 8. Blood travels TOWARDS the heart through _________ (5) 9. Blood travels AWAY from the heart through __________ (8) Down 2. The process during which the heart fills with blood, then pumps it around the body is called the ________ ______ (7, 5) 3. Walls of a blood vessel contains __________, which makes them strong and durable (8) 6. Very small (THIN) blood vessels (11) 10. Thrombin is an enzyme which catalyses the conversion of fibrinogen (soluble protein) into the insoluble protein __________ (6)
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