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Respiratory System - Coggle Diagram
Respiratory System
EXERCISE
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- Internal intercostal muscles contract pushing the rib cage down and in more.
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- Rectus Abdominus contracts.
- Thoratic cavity capacity gets even smaller.
- Air pressure increases more.
- More air rushes out of the lungs.
REST
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- Diaphragm flattens and external intercostal muscles lift the rib cage up and out.
- Thoracic cavity volume increases.
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- Creates a diffusion gradient .
- Air rushes into the lungs (travels from high to low pressure).
REST
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- Diaphragm relaxes the returns were dome shape and external intercostal muscles relax and return to normal shape.
- Thoratic cavity volume decreases.
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- Creates a diffusion gradient.
- Air rushes out of the lung (travels from high to low pressure).
EXERCISE
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- External intercostal muscles contract with more force. Pushes the rib cage up and out further.
- Sternocleidomastoid contracts to help lift the rib cage up and out more.
- Diaphragm contracts with more force.
- Pressure gets even lower in the lungs.
- More air rushes into the lungs.
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CONTROL OF BREATHING
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- Send impulse to brain - Medula Oblongata
- Into the RCC - Respiratory Control Centre
- Travel down nerve impulses, from two parts of the RCC.
Inspiratory Centre - Stimulates the external intercostal muscles and the diaphram, then during exercise also the sternocleidomastoid. This increases rate and depth of inspiration.
Expiratory Centre - Stretch reflex receptors on muscles between ribs cause this to be activated, it stimulates the internal intercostal muscles and the rectus abdominus. This will increase the rate of expiration and the volume of air expired.