Breathing
- Created by: Narey7Emily97
- Created on: 09-12-13 15:40
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- Breathing
- Ventilation is Breathing In and Out
- Inspiration
- The intercostal and diaphragm muscles contract
- This causes the ribcage to move upwards and outwards and the diaphragm to flatten, increasing the volume of the thorax
- As the volume of the thorax increases the lung pressure decreases
- This causes air to flow intro the lungs
- Inspiration is an active process - it requires energy
- This causes air to flow intro the lungs
- As the volume of the thorax increases the lung pressure decreases
- This causes the ribcage to move upwards and outwards and the diaphragm to flatten, increasing the volume of the thorax
- The intercostal and diaphragm muscles contract
- Expiration
- The intercostal and diaphragm muscles relax
- The ribcage moves downwards and inwards and the diaphragm becomes curved again
- The thorax volume decreases, causing the air pressure to increase
- air is forced out of the lungs
- Expiration is a passive process - it doesnt require energy
- air is forced out of the lungs
- The thorax volume decreases, causing the air pressure to increase
- The ribcage moves downwards and inwards and the diaphragm becomes curved again
- The intercostal and diaphragm muscles relax
- Inspiration
- Tidal volume is the volume of air in a normal breath
- Tidal volume is the volume of air in each breath
- Ventilation rate is the number of breaths per minute
- Pulmonary ventilation is the product of tidal volume and ventilation rate. Pulmonary ventilation = Tidal volume X Ventilation Rate
- Ventilation is Breathing In and Out
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