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Biology GCSE AQA > Lungs > Flashcards

Flashcards in Lungs Deck (9)
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1
Q

Where are the lungs?

A

Upper part of body - thorax

2
Q

What is an iron lung and how does it work?

A
  • It is a metal cylinder in which a patient lies in. It helps patients with breathing difficulty to breathe.
  • Negative pressure ventilators.
  • The patient is placed in a machine airtight from the neck down.
  • A vacuum is placed outside the patient’s thorax.
  • The air pressure outside is decreased.
  • As a result, air is drawn into the lungs.
  • As the vacuum is released, the elasticity of the lungs, diaphragm ad chest wall cause exhalation.
3
Q

What are the lungs protected by?

A

Ribcage

4
Q

What is the abdomen?

A

Lower part of the body

5
Q

What seperates the lungs from the abdomen?

A

Diaphragm

6
Q

What does the breathing system do?

A

Take air into and out of body
Oxygen from air diffuses into bloodstream
Carbon dioxide diffuses out of the bloodstream into air

7
Q

How does air move into the lungs?

A
Ribcage moves out and up
Diaphragm becomes flatter
Volume of thorax increases 
Pressure in thorax decreases
Air drawn in
8
Q

How does air move out of the lungs?

A
Changes when air moving into the lungs REVERSED 
Ribcage moves down and in 
Diaphragm becomes domed (curved) 
Volume of thorax decreases
Pressure increases 
Air forced out
9
Q

What is ventilation?

A

The movement of air into and out of the lungs

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