751745
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Mind Map by evie.daines, updated more than 1 year ago
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Created by evie.daines
over 10 years ago
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Biology AQA 3.1.4 Lung Function
- The gross structure of the human gas exchange system limited to the alveoli, bronchioles,bronchi, trachea and lungs.
- Diagram of the lungs.
- Trachea
- There is a layer of cells with cilla on top, also goblet cells produce mucus which traps any dust and dirt within the lungs.
- Mucus is then passed down the oesophagus
- Mucus is then passed down the oesophagus
- There is a layer of cells with cilla on top, also goblet cells produce mucus which traps any dust and dirt within the lungs.
- Diagram of the lungs.
- The essential features of the alveolar epithelium as a surface over which gas exchange takes place
- ADAPTIONS OF THE ALVEOLI
- Large surface area
- Thin
- Partially permeable membrane
- Movement of environmental medium (breathing)
- Movement of internal medium (heart pumps blood)
- Small capillaries
- Large surface area
- ADAPTIONS OF THE ALVEOLI
- The exchange of gases in the lungs
- Diffusion & (surface area x difference of concentration) / Length of diffusion pathway
- Diffusion & (surface area x difference of concentration) / Length of diffusion pathway
- pulmonary ventilation as the product of tidal volume and ventilation rate
- Pulmonary ventilation (dm^3min^-1) = tidal volume (dm^3) x ventilation rate (min^-1)
- PV: the total volume of air that is moved into the lungs
- The volume of air taken in during each breath
- The number of breath's taken in one minute
- PV: the total volume of air that is moved into the lungs
- Pulmonary ventilation (dm^3min^-1) = tidal volume (dm^3) x ventilation rate (min^-1)
- The mechanism of breathing
- Inspiration
- process of breathing in- uses energy in the form of ATP
- EXTERNAL intercoastal muscles contract
- Ribcage pulled upward and outward
- Diagphragm contracts
- Increased volume and lower pressure
- EXTERNAL intercoastal muscles contract
- process of breathing in- uses energy in the form of ATP
- Expiration
- The process of breathing out
- INTERcoastal muscles contract
- Ribcage moved downwards and inwards
- Diagphragm relaxes (curves upwards)
- Volume decreases and pressure incread - ready for elastic recoil
- INTERcoastal muscles contract
- The process of breathing out
- Inspiration
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