1. Levels of Organization

2. Objective: Relate an organ to its parts and the larger system it is a part. Essential Question: How does the body work together?

4. Cells are the basic unit of life!

5. Groups of cells working together form a TISSUE
There are 4 types of tissues with different jobs:
Epithelial Tissue
Nervous Tissue
Muscle Tissue
Connective Tissue

6. EPITHELIAL TISSUE
Covers and protects underlying tissue. When you look at the surface of your skin, you see epithelial tissue

7. NERVOUS TISSUE
Sends electrical signals through the body. It is found in the brain, nerves and sense organs.

8. MUSCLE TISSUE
Made up of cells that can contract and relax to produce movement

9. CONNECTIVE TISSUE
Joins, supports, protects, insulates, nourishes, and cushions organs. It also keeps organs from falling apart.

10. Two or more tissues working together, form an organ.
Organs include the heart, skin, lungs, liver, kidneys, etc.

11. ORGAN + ORGAN = ORGAN SYSTEM
Organs working together
make up an organ system.
The failure of any part can affect the entire system

12. Organism Any living thing.
Organ Systems work together to make up organism!

14. 11 MAJOR ORGAN SYSTEMS all depend on each other!
Reproductive system.
Nervous system
Lymphatic system
Digestive system
Endocrine system
Integumentary system
Muscular system
Skeletal system
Cardiovascular system
Respiratory system
Urinary system

15. Reproductive System
Functions: to allow the organism to reproduce (make babies). Pertinent (extremely important) to the survival of the species.

16. Reproductive System
Structures: Females produces cells called eggs held in the organs called ovaries, and males produce the cells spermatozoon held in organs called testes.

17. Integumentary System Includes skin, hair, and nails.
The skin is our largest organ!

18. Muscles for moving, heart beat, and digestion.
Muscular System
Muscles for moving, heart beat, and digestion.

19. Skeletal System
Bones frame and protect body parts.

20. Cardiovascular System
The heart pumps blood to every cell for food and waste removal.

21. Respiratory System
Lungs absorb oxygen and release carbon dioxide.

22. Removes wastes from the blood and regulates body fluids.
Urinary System
Removes wastes from the blood and regulates body fluids.

23. Receives and sends electrical messages with neurons.
Nervous System
Receives and sends electrical messages with neurons.

24. Lymphatic System
Returns leaked fluids to blood vessels and helps flush harmful germs out.

25. Digestive System
Breaks down food into nutrients.

26. Endocrine System
Glands regulate body functions by sending out chemical messages.