HUMAN BODY

3. Internal skeleton that provides structure, support, and protection for the internal organs and tissues of an organism.
5. A living thing.
8. Two organs that help the body maintain balance by filtering and eliminating waste from the blood to make urine.
10. An animal that lacks a backbone.
11. The organ that secretes bile to aid in digestion; removes harmful substances from the blood.
13. Structures inside your body that allow your body to move.
14. The organ that uses digestive juices to break down food to supply energy to the body.
16. Made of bones; internal structure that holds the body together; stores important nutrients and minerals; makes blood cells.
17. A large mass of similar tissue that makes up a part of an organism that performs a specific function.
18. Two organs that take in (inhale) oxygen and release (exhale) carbon dioxide into the air.

1. The organ that collects and holds urine.
2. The process of making more organisms of the same kind.
4. Gland behind the stomach that produces insulin; makes juices to help the small intestine digest fat and protein.
6. The organ that protects the internal organs of the body; senses heat, cold, pressure, and pain; the outside layer of the body.
7. The organ that receives and sends messages throughout the body in order to tell body parts what to do; the control center of the body.
9. A hard external skeleton (outer covering) that supports and protects an animal's body.
12. An animal that has a backbone.
15. The organ that pumps blood enriched with nutrients to all of the body parts.