Respiratory System
Cards (5)
- Cutaneous - exchange of gases through the skin (worms)
- Tracheal - air moves through the openings in the body surface called spiracles (insects)
- Branchial - respiration through gills (fish)
- Pulmonary - represents total exchange of air between the lungs and the outside air
- Alveoli - where oxygen and carbon dioxide exchange takes place between these and capillaries