Chapter 1
The architecture of the airway
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Chapter 2
The magic of the alveoli
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Chapter 3
The mechanics of the breath
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Chapter 4
Adapting to the extremes
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Chapter 5
The history of discovering respiration
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YOUR GOAL
Master of How the lungs capture oxygen
Ch 3 · The mechanics of the breath
artiteacher The mechanics of the breath
Take a breath and stretch it out, wide like a tennis court!
Fun Fact
Sneeze speed: A sneeze can expel air and particles from your respiratory tract at speeds exceeding 100 miles per hour.
Glossary
diaphragm (noun)
A dome-shaped muscular partition separating the thorax from the abdomen in mammals, which plays a major role in breathing. Its downward contraction expands the thoracic cavity, creating the negative pressure needed to draw in air.
A dome-shaped muscular partition separating the thorax from the abdomen in mammals, which plays a major role in breathing. Its downward contraction expands the thoracic cavity, creating the negative pressure needed to draw in air.
Quiz
What chemical change in the blood triggers the brain to increase your breathing rate?
Quiz
Which part of the brainstem acts as the autopilot to control your breathing rate?
Quiz
Which gas law explains how changing the chest's volume causes air to enter the lungs?
Quiz
How far does the diaphragm typically move downward during a quiet, normal breath?