Breathing Mechanics (OCR GCSE Physical Education): Flashcards
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Muscles contracting during inspiration (at rest)
Muscles contracting during inspiration (at rest)
Diaphragm & external intercostal muscles
Action of external intercostals on ribs (inspiration)
Action of external intercostals on ribs (inspiration)
Raise ribs upwards & outwards
Chest cavity volume change during inspiration
Chest cavity volume change during inspiration
Increases
Effect of increased chest volume
Effect of increased chest volume
Air rushes into lungs
Muscles relaxing during expiration
Muscles relaxing during expiration
Diaphragm & external intercostal muscles
Muscles contracting during expiration
Muscles contracting during expiration
Internal intercostals
Rib movement during expiration
Rib movement during expiration
Lower downwards & inwards
Chest cavity volume change during expiration
Chest cavity volume change during expiration
Decreases
Effect of decreased chest volume
Effect of decreased chest volume
Air forced out of lungs
Extra muscles used during exercise inspiration
Extra muscles used during exercise inspiration
Pectorals & sternocleidomastoid
Action of pectorals & sternocleidomastoid in exercise
Action of pectorals & sternocleidomastoid in exercise
Raise the sternum
Effect of raised sternum during exercise
Effect of raised sternum during exercise
Lungs expand further
Muscles contracting during exercise expiration
Muscles contracting during exercise expiration
Abdominal muscles (pull rib cage down quickly)