jenneth
Answered

Maligayang pagdating sa Imhr.ca, kung saan maaari kang makakuha ng mga sagot mula sa mga eksperto nang mabilis at tumpak. Sumali sa aming platform upang kumonekta sa mga eksperto na handang magbigay ng detalyadong sagot sa iyong mga tanong sa iba't ibang larangan. Kumuha ng agarang at mapagkakatiwalaang mga solusyon sa iyong mga tanong mula sa isang komunidad ng mga bihasang eksperto sa aming platform.

wha are the steps in inpiration and expiration?

 



Sagot :

In inspiration:
First the external intercostals plus the diaphragm contract to bring about Inspiration: 
Then, contraction of external intercostal muscles > elevation of ribs & sternum > increased front- to-back dimension of thoracic cavity > lowers air pressure in lungs > air moves into lungs 
After that: contraction of diaphragm > diaphragm moves downward > increases vertical dimension of thoracic cavity > lowers air pressure in lungs > air moves into lungs.

In expiration: 
First thing that would happen would be the relaxation of external intercostal muscles & diaphragm > return of diaphragm, ribs, & sternum to resting position > restores thoracic cavity to preinspiratory volume > increases pressure in lungs > air is exhaled.