biology 0.0 / 5 ? Biologyb1GCSEAQA Created by: elliehogginsCreated on: 07-07-17 10:55 1092613847 Across 1. Tiny air sacs in the lungs, where gas is exchanged during breathing. (7) 4. Microorganism that causes disease. (8) 7. A blood vessel with valves that transports blood to the heart. (4) 9. a type of respiration where oxygen is absent (9) Down 1. a type of respiration in the presence of oxygen (7) 2. ery thin blood vessels which have walls that are only one cell thick. (11) 3. An ultramicroscopic infectious non-cellular organism that can replicate inside the cells of living hosts, with negative consequences. (5) 6. A type of cell division which produces daughter cells identical to the parent. (7) 8. Muscular organ that pumps blood around the body. (5) 10. Tiny holes in the epidermis (skin) of a leaf - usually on the undersides of leaves. They control water loss and gas exchange by opening and closing. (7)
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