1. INTRODUCTION TO HUMAN BIOLOGY pp. 907-910

2. Levels of Organization
Cell Tissue Organ Organ System Organism

3. BODY TISSUES

4. BODY TISSUES
muscle: contract in coordination upon stimulation (skeletal, cardiac, smooth)
nervous: receive and transmit information and signals (made of cells called neurons)

5. BODY TISSUES
epithelial: cover inner and outer surfaces of bodies, cavities, and canals

6. BODY TISSUES connective 1. bone, cartilage, tendons, blood
2. cells surrounded by extra-cellular, non-
living tissue

7. ORGANS
tissues working together

8. ORGAN SYSTEMS
Two or more organs working together for a specific function

9. ORGAN SYSTEMS Skeletal: protection and support
Muscular: support and movement
Skeletal: protection and support

10. Circulatory: transport of gases, nutrients, waste, and chemicals to all parts of the body.
Respiratory: gas exchange

11. Integumentary (skin): protection
Immune: fights pathogens
Integumentary (skin): protection

12. Nervous: regulation, conduction, and coordination
Endocrine: controls body function via chemical messengers.

13. Digestive: breakdown and absorption of food
Excretory: removal of liquid, gas, and solid wastes

14. Reproductive: production of sex cells (offspring)

15. BODY CAVITIES Organs housed and protected in cavities
spinal, cranial, thoracic, diaphragm, abdominal, pelvic