Structure of the Lungs
Textbook 4.1 notes
- Created by: Mima
- Created on: 08-01-13 21:00
View mindmap
- The Lungs - 4.1, structure
- Lungs
- Pair of lobed structures
- Made up of branched tubules (bronchioles)
- End with the alveoli
- Trachea
- Flexible airway
- Supported by rings of cartilidge
- prevents the trachea collapsing as the air pressure decreased when breathing in
- Walls made up of muscle
- lined with ciliated epithelilium and goblet cells
- Goblet cells produce mucus to trap particles
- Cilia move the mucus up to the throat then to the stomach
- lined with ciliated epithelilium and goblet cells
- Bronchi
- Similar in structure to trachea
- Produce mucus to trap particles and have cilia
- Suuported by cartalidge, which reduces as they get smaller
- Bronchioles
- series of branching subdivisions of the bronchi
- Their walls are made of muscle alines with epithelial cells
- this muscle alows them to constrict controlling the flow of air in and out of the alveoli
- Alveoli
- Are minute air sacs
- at end of bronchioles
- 100µm-300µm
- Contain some collagen and elastic fibres, lined with epithelium
- allows the alveoli to stretch as air fills in
- spring back as breathe out to expel carbon dioxide
- Are minute air sacs
- Mammalian Lungs
- Located inside the body
- air is not enough density to support and protect these delicate strucutres
- they would otherwise lose a vast amount of water and dry out
- Located inside the body
- Aerobic respiration
- requires constant supply of oxygen and ATP
- Lungs
Comments
No comments have yet been made