Human Body Systems and Organization Crossword

3. The process of maintaining stable conditions inside the body.
4. Blood vessels that carry blood away from the heart.
6. The smallest unit of life that can carry out all life processes.
7. The body system responsible for breathing and gas exchange.
9. The body system responsible for producing offspring.
12. The body system that protects the body from disease and infection.
15. Organs that remove waste and extra water from the blood.
17. The body’s outer covering that protects against injury and germs.
18. An organ that stores urine until it leaves the body.
22. The body system that transports blood, oxygen, and nutrients throughout the body.
23. A group of organs that work together to perform a major body function.
26. Blood vessels that carry blood back to the heart.
27. A large organ that filters blood and helps digest food.

1. A muscle below the lungs that helps with breathing.
2. The way something is built or organized.
5. A muscular organ that pumps blood throughout the body.
8. The organ that controls thoughts, memory, movement, and body functions.
10. A living thing made up of one or more cells.
11. The body system that uses hormones to regulate body functions.
13. The body system that allows movement and helps maintain posture.
14. The body system that sends messages and controls body activities.
16. The body system that breaks down food and absorbs nutrients.
17. The body system that provides support, protection, and shape using bones.
18. Hard structures that support and protect the body.
19. Organs that take in oxygen and remove carbon dioxide.
20. Body tissues that contract to produce movement.
21. A body structure made of different tissues working together.
24. The tube that carries air from the throat to the lungs.
25. A group of similar cells working together to do a specific job.