circulatory system 0.0 / 5 ? BiologyBiological moleculesASNone Created by: amyyeldhamCreated on: 04-12-14 15:15 251467 Across 1. this has a double circulatory system (6) 5. the pressure in humans to the lungs is (5) 6. what is the gas exchange in insects called? (8, 6) 7. this is a single circulatory system (4) Down 1. the pressure in humans from heart around the body is (4) 2. in gaseous exchange surfaces there are many common features such as: large surface area, moist due to oxygen dissolved in fluid and thin and ... (9) 4. what are the small holes in the exoskeleton called? (9)
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