Across
- 3. Protects the body's internal environment and stores fat.
- 5. Enables gas exchange with the blood.
- 9. Enables the transport of nutrients, gasses and wastes to and from cells.
- 11. Senses external environment and communicates with and activates other parts of the body.
Down
- 1. Provides mechanical support; stores minerals and produces red blood cells.
- 2. Filters and eliminates liquid wastes; regulates water balance.
- 4. Produces gametes and supports development.
- 6. Secretes hormones into the bloodstream for regulation of cellular activities.
- 7. Allows ingestion and breaks down food so that nutrients can be absorbed.
- 8. Enables movement, maintains posture and can store energy.
- 10. Protects against foreign substances.