1. Circulation & Gas Exchange
Animals & Humans
Circulation & Gas Exchange

2. Circulation - Animals Movement of nutrients and waste products
Open systems
Hearts or heart-like structures
Blood vessels
Sinuses

3. Closed systems Blood vessels Heart or heartlike structure
Blood remains in vessels all the time
Pumps blood more quickly

4. Hearts
Atrium
Ventricle

5. Single loop or double loop system

6. Circulation - Humans Closed system 4 chambered heart
Double loop system
Arteries, veins, and capillaries
Blood – red blood cells, white blood cells, platelets
Why do we need it?

8. Gas Exchange - Animals Taking in oxygen and eliminating carbon dioxide
Diffusion

9. Gills

10. Terrestrial animals: Skin Mantle cavities Book lungs Tracheal tubes

11. Gas Exchange - Humans Mouth, nose Trachea Bronchi Lungs Diaphragm
Alveoli