Mechanism of breathing

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  • Created by: patricia
  • Created on: 21-11-13 16:34
What is ventilation?
The movement of air over the gaseous exchange surface
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What muscles control the thorax?
Intercoastal muscles+Diaphragm
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What type of ventiiation happens in the lungs?Explain
Tidal which means air flows in and out by the same route
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What is the rule of air flow?
Air flows from high to low pressure
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Why can't the lungs ventilate?So how can they ventilate?
Because they're not muscular enough therefore they have the thorax that moves and changes shape
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What is the ventilation rate?
It is the breathing rate- the no. of breaths taken in one minute
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What is the tidal volumne?
The volumne of air breathed in or out of the lungs per breath
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What is the vital capacity?
The maximum volumne of air that it breathed out/ forcibily expelled out from the lungs
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Residual volumne?
The volumne of air remaining in your lungs at the end of maximal expiration
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Explain the full process of Inspiration
EX intercoastal muscles contract+ IN intercoastal muscles relax+ ribs moves upwards and outwards+Diaphragm contracts and flattens-->increase volumne thorax >decrease lung pressure= air moves in bcos air pressure is greater
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Explain the full process of Expiration
Inner intercoastal.m contract+ EX I.M relax+ ribs downwards and inwards+diaphragm relaxes goes upwsrds to a dome-->decrease in volumne of thorax-->pressure in lungs increase=air pushed out of lungs bcos air pressure outside is greater
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What is the air movement along pressure gradient for inspiration?
Above-->
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What is the air movenent along pressure gradient for expiration?
Below
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Describe the equation of Pulmonary Ventilation
Pulmonary ventilation (min-1 dm3) = Ventilaion rate (min-1) x Tidal volume (dm3)
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Other cards in this set

Card 2

Front

What muscles control the thorax?

Back

Intercoastal muscles+Diaphragm

Card 3

Front

What type of ventiiation happens in the lungs?Explain

Back

Preview of the front of card 3

Card 4

Front

What is the rule of air flow?

Back

Preview of the front of card 4

Card 5

Front

Why can't the lungs ventilate?So how can they ventilate?

Back

Preview of the front of card 5
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