Across
- 1. Humans are an example
- 3. tissue Has characteristics that force the heart to beat
- 6. system The system that controls breathing
- 8. system These organs extract nutrients from foods
- 9. system The organ system that protects the body from damage, comprising the skin and its appendages
Down
- 2. system Bones and joints
- 4. system The system that protects the body from infection
- 5. The main building block of the human body
- 7. Smallest level of organization for living things
- 10. system Controls everything that happens in our bodies