Across
- 2. How is oxygen from the air is distributed to the tissues through a network of air channels?
- 4. Aquatic invertebrates, most fish and amphibian frogs breathe with it.
- 5. Dolphins, whales, birds, reptiles, mammals breathe with it.
- 6. The function of the respiratory system is to ensure the exchange of airways between the organism and the...
Down
- 1. Some groups of arachnids have it.
- 2. What does the exchange of respiratory gases occurs by?
- 3. Through respiratory dyes contained in body fluids.