1. INTRODUCTION TO HUMAN BIOLOGY pp. 907-910

2. Physiology vs. Anatomy
ANATOMY: study of the structure of the human body
PHYSIOLOGY: study of the functions of the human body

3. Levels of Organization
Cell Tissue Organ Organ System Organism

4. TISSUES
Group of cells working together

5. TYPES of TISSUES 1. MUSCLE: contract in coordination upon stimulation
Skeletal- voluntary movement
cardiac and smooth- involuntary movement

6. TYPES of TISSUES
2. NERVOUS: receive and transmit information and signals (made of cells called neurons)
Never grows back once damaged
Long extensions allows for fast communication

7. TYPES of TISSUES
3. EPITHELIAL: cover inner and outer surfaces of bodies, cavities, and canals

8. BODY TISSUES 4. CONNECTIVE
cells surrounded by extra-cellular, non- living tissue
bone, cartilage, tendons, blood

9. ORGANS
tissues working together

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

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

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

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

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

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

16. Reproductive: production of sex cells (offspring)

17. BODY CAVITIES
Organs housed and protected in cavities

18. BODY CAVITIES Organs housed and protected in cavities Cranial-brain
Spinal-spine
Thoracic-heart and respiratory organs (diaphragm separates thoracic and abdominal)
Abdominal-digestive system organs
Pelvic-reproductive and excretory organs