B2 T3 organ systems pt 1 0.0 / 5 ? BiologyEvolution, extinction and natural selectionGCSEEdexcel Created by: John@11gCreated on: 01-04-15 16:21 3571210489 Across 1. mass of organisms including water (3, 4) 3. two in every heart, blood goes there second (9) 4. e.g. mitosis (4, 8) 5. help blood to clot (9) 9. mass of organisms without water (3, 4) 10. take blood back to the heart, blood is under low pressure (5) Down 2. a group of similar cells which work together to carry out a function (7) 3. prevent a back flow of blood (6) 7. space inside the blood vessel where blood goes (5) 8. a group of different tissues that work together to carry out a function (6)
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