Across
- 2. a layer of cells usually enclosing around something
- 5. the system that breaks down food
- 9. major structures are skin, nails, and hair
- 13. the system that removes waste from the body
Down
- 1. the system that is made up of bones
- 3. the system that fights disease
- 4. the system that produces an offspring
- 6. major structures are,skeletal,smooth,and cardiac muscle tissues
- 7. the system that transports nutrients, wastes, and gases
- 8. tiny units that are the simple building blocks of living things
- 10. the system that regulates behavior
- 11. a group of bodily organs that together carry on one or more vital functions
- 12. a part of a person, plant, or animal that consists of cells and tissue