1. 5.Tissues, Organs and Systems 1

2. You know that cells are the smallest part of your body 2 And you know that different cells have different jobs

3. But cells do not work alone 3 Cells that look alike and that do the same job work together in a group

4. A group of skin cells doing the same job is called skin tissue 4 Vocabulary: tissue A group of cells doing the same job

5. One kind of skin tissue covers your body 5 Another kind of skin tissue lines your mouth, stomach, and other body parts

6. Your body has other kinds of tissue 6 Bundles of muscle cells form muscle tissue

7. You also have blood tissue, nerve tissue and bone tissue 7

8. What is happening while you are writing notes? 8

9. Your heart is pumping 9 You breathe in and out with your lungs

10. Your eyes see the words that you write Your brain helps you understand the words 10

11. All of these body parts are examples of organs 11 Vocabulary: organs A group of different tissues working together to do a job

12. Your heart is made of blood tissue, nerve tissue, and muscle tissue What is the job of your heart? 12

13. Your skin has many different layers 13 Each layer has a different job

14. Your skin is the largest organ of your body 14 All the parts of your skin put together form an organ

15. Your stomach is an organ, too Your stomach is an organ that helps in the job of breaking down food 15

16. Remember that the smallest parts of your body are its cells A group of cells doing the same job forms tissue 16

17. A group of tissues working together forms an organ Organs work in groups, too 17

18. 18 Vocabulary: system A group of different tissues working together to do a job Your body is made up of many systems

19. Think of a factory where cars are made One part of the factory makes the metal body 19

20. Another part installs the glass Still another part of the factory puts on the tires 20

21. You must have all the parts to make a complete car 21

22. Your body systems are like the parts of a factory Each system does a different job, but they work together to keep you healthy 22