Inspiration expiration Flashcards
What is inspiration
Breathing in
What is expiration
Breathing out
What are the 5 stages of inspiration
Diaphragm contracts and moves down to become flat.
external intercostals contract and moves the rib cage upwards and outwards.
The volume of the thoracic cavity (chest) increases.
Pressure decreases in the lungs compared to outside.
Air rushes in
What are the 5 stages of expiration
internal intercostals contract and moves the rib cage inwards and downwards.
Abdominal muscles contract and the stomach and liver push the diaphragm back so it is domed again.
The volume of the thoracic cavity (chest) decreases.
Pressure increases.
Air rushes out.
What happens to the external intercostal muscles during inspiration
external intercostals contract and moves the rib cage upwards and outwards.
What happens to the internal intercostal muscles during expiration
internal intercostals contract and moves the rib cage inwards and downwards.
What happens to the diaphragm during inspiration
Diaphragm contracts and moves down to become flat.
What happens to the diaphragm during expiration
the stomach and liver push the diaphragm back so it is domed again.
What happens to the change in volume of the thorax during inspiration
The volume of the thoracic cavity (chest) increases.
What happens to the change in volume of the thorax during expiration
The volume of the thoracic cavity (chest) decreases.
What happens to the change in air pressure during inspiration
Pressure decreases in the lungs compared to outside.
What happens to the change in air pressure during expiration
Pressure increases.
what does expiration and inspiration mean for oxygen and carbon dioxide
oxygen is brought into the lungs and carbon dioxide is excreted.
