Tissues in Lungs
- Created by: shimolishah15
- Created on: 30-09-19 11:40
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- Tissues in Lungs
- Cartilage
- Supports the trachea and the bronchi.
- It stops them from collapsing when the pressure drops.
- Strong and flexible.
- The rings of cartilage are C shaped rather than complete rings.
- This allows flexibility and space for food to pass down the oesophagus.
- Allows oesophagus to expand during swallowing.
- Located in trachea and bronchi.
- Trachea = large C shaped pieces.
- Bronchi = small cartilage pieces.
- Supports the trachea and the bronchi.
- Smooth muscle
- Allows the diameter of the airways to be controlled.
- Constricts the airway.
- This makes the lumen of the airway narrower which can restrict airflow to and from the alveoli.
- The contraction of the smooth muscle and the control of the airflow is not voluntary and may occur due to an allergic reaction.
- Once a smooth muscle contracts, it can't be reversed on its own. It is elongated by elastic fibres.
- Once a smooth muscle contracts, it can't be reversed on its own. It is elongated by elastic fibres.
- Located in the trachea, bronchi, largest bronchioles and smaller bronchioles.
- Goblet Cells
- Line the airway.
- Secrete mucus which traps the microorganisms and dust particles in the inhaled air and stops them to reach the alveoli.
- Ciliated epithelium
- Cartilage
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