lungs and gas exchange
- Created by: Muskaan Dhaliwal
- Created on: 07-08-19 17:03
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- lungs and gas exchange
- the heart pumps low oxygen/high carbon dioxide blood to lungs
- trachea
- carries air to/from the lungs
- rings of cartilage protect the airway
- bronchioles
- carries air to/from the air sacs (alveoli)
- splits into multiple pathways to reach all the alveoli
- alveoli
- site of gas exchange
- maximises surface area for efficient gas exchange
- capillaries
- allows gas exchange between into/out of blood
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