Across
- 4. are visible as round openings along the body segments.
- 7. carries oxygen, water, and nutrients to all the cells of the body
- 8. system takes in oxygen and releases carbon dioxide
Down
- 1. system breaks down food that the body uses for energy.
- 2. system is a body system that provides internal and external movement for a animal.
- 3. system collects and processes information.
- 5. system removes waste from the body.
- 6. platyhelminthes have well-developed muscular system.