Respiratory system mechanics of breathing EXERCISE - anatomy and physiology Flashcards
What happens to the Diaphragm ? Inspiration
flattens and contracts with more force
What happens to the Intercostal muscles ? Inspiration
External muscles contract with more force
What happens to the Ribs ? Inspiration
moves further up and out
What happens to the Thoracic cavity volume ? Inspiration
increases further
What happens to the Thoracic cavity pressure ? Inspiration
decreases further and more air rushes into lungs.
What happens to the Diaphragm ? Expiration
relaxes and moves back up
What happens to the Intercostal muscles ? Expiration
internal intercostal muscles relax
What happens to the Ribs ?Expiration
move down and in further
What happens to the Thoracic cavity volume ?Expiration
decreases further
What happens to the Thoracic cavity pressure ?Expiration
increases further and more air rushes out of lungs.
What happens to the pectoralis muscle? Inspration
Contract
What happens to the rectus abdominals and obliques? Expiration
Contract
