abdominal muscles
innermost layer
Inspiration and expiration are both considered one respiratory movement.
"Vigorous" means strong, energetic, or done with forceful effort. It typically describes actions or activities with a lot of physical force or intensity.
Answer this question… Serious and forceful
Forceing
The forceful removal of Iraq from Kuwait.
spate forceful flowings would be spates
The term "forceful" means to act with strength, power, or intensity. It typically describes behaviors or actions that are vigorous, assertive, or influential in nature.
Gentle warm words are more likely to get what you want than being forceful and harsh.
Assertive means about the same as "quietly forceful."
The primary muscle used in active expiration is the diaphragm (it relaxes from its contracted state to decrease the volume in the lungs, forcing air out). Internal intercostals, the interosseous portion, will assist by pulling the rib cage down.