Body Systems

2. Tissues that contract and relax to produce movement in the body.
3. A muscular organ in the abdomen that helps with digestion by breaking down food.
4. A hard, dense organ that provides support and protection to the body's organs and facilitates movement.
5. Tiny air sacs in the lungs where oxygen is absorbed into the bloodstream and carbon dioxide is removed.
9. The liquid component of blood that carries blood cells and nutrients throughout the body.
11. A flap-like structure in the heart and some blood vessels that ensures blood flows in one direction.
12. To separate and remove impurities or waste materials from a fluid
13. A group of similar cells that work together to perform a specific function in the body.
15. Liquid waste produced by the kidneys that is stored in the bladder before being excreted from the body.
16. A gland in the abdomen that produces digestive juices that are delivered to the small intestine.
17. A tough band of tissue that connects muscle to bone, allowing for movement.
19. A protein that helps speed up chemical reactions in the body, such as the digestion of food.
20. A blood vessel that carries oxygenated blood away from the heart to other parts of the body.

1. The muscular organ that pumps blood throughout the circulatory system.
2. The physical process of breaking down food into smaller pieces in the digestive system.
6. A muscle below the lungs that helps with breathing by expanding and contracting the chest cavity.
7. An organ that filters waste and excess substances from the blood to create urine.
8. Unwanted or unusable substances produced in the body, which need to be removed.
10. The measurement of the outer part of an object or organ, which can affect its function.
14. A group of related organs that work together to perform a specific function for the body.
18. A structure made up of different tissues that serves a particular purpose, such as the heart or the stomach.