Biology, 14.05.2021 15:30 melinda12ms
1. Compact, complex animals have internal exchange surfaces that are extensively branched or folded, providing a large .
2. In the , nutrients are absorbed across the many fingerlike projections of the lining of the intestine.
3. In the , oxygen and carbon dioxide are exchanged across the epithelial linings of sacs at the tips of tiny air tubes.
4. In the , wastes are removed from the blood across the epithelial linings of excretory tubes.
5. The transports materials between the exchange surfaces of other organ systems and body cells.
6. Body cells are bathed in , and exchange between body cells and the blood takes place through this fluid.
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