Cells, tissues, organs and organ systems

2. groups of organs that work together to perform major body functions
4. organs that filter waste from the blood and produce urine
8. a fluid that carries oxygen, nutrients, and waste around the body
10. a muscle under the lungs that helps with breathing by moving up and down
12. the smallest unit of life; all living things are made of cells
13. the job or role something has in a system or process
14. a muscular organ that breaks down food with acids and enzymes
15. the system that allows breathing and gas exchange between the body and air
19. the part of the digestive system that absorbs water and forms solid waste
20. the system of bones that supports the body and protects internal organs
21. organs that take in oxygen and remove carbon dioxide during breathing
22. what happens when a plant loses too much water and becomes limp or droopy

1. an organ that breaks down toxins, stores nutrients, and helps digestion
3. the part of the digestive system where most nutrients from food are absorbed
5. the system that breaks down food and absorbs nutrients into the body
6. the system that transports blood, oxygen, and nutrients throughout the body
7. an organ that stores urine before it is removed from the body
9. a group of tissues working together to carry out a specific function in the body
11. a muscular organ that pumps blood around the body
16. a group of similar cells working together to perform a function
17. the outer covering of the body that protects it and helps control body temperature
18. tubes like arteries and veins that carry blood throughout the body