Pressure changes during inspiration: Respiratory physiology USMLE Step 1

📌𝐅𝐨𝐥𝐥𝐨𝐰 𝐨𝐧 𝐈𝐧𝐬𝐭𝐚𝐠𝐫𝐚𝐦:- / drgbhanuprakash
📌𝗝𝗼𝗶𝗻 𝗢𝘂𝗿 𝗧𝗲𝗹𝗲𝗴𝗿𝗮𝗺 𝗖𝗵𝗮𝗻𝗻𝗲𝗹 𝗛𝗲𝗿𝗲:- t.me/bhanuprakashdr
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pressure changes during inspiration respiratory physiology
During inspiration, several changes occur in the respiratory system, including changes in pressure.
Firstly, the diaphragm and intercostal muscles contract, causing the thoracic cavity to expand. This expansion increases the volume of the lungs, which in turn reduces the pressure within the alveoli (the tiny air sacs in the lungs where gas exchange occurs). This drop in pressure creates a pressure gradient between the alveoli and the atmosphere outside of the body.
As a result, air flows from an area of higher pressure (the atmosphere) into an area of lower pressure (the alveoli) down the pressure gradient. This is known as inspiration or inhalation.
In terms of specific pressure changes, during inspiration, the pressure inside the lungs decreases from about 760 mmHg (atmospheric pressure at sea level) to about 756 mmHg, creating a pressure gradient that drives air into the lungs. The pressure within the thoracic cavity also decreases, creating a negative pressure that helps to draw air into the lungs.
Overall, the pressure changes that occur during inspiration are essential for bringing oxygen into the body and removing carbon dioxide from the body through the process of respiration.
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[@himadribanik4867]

The best video on mechanics of respiration so far in youtube.. without any doubt❤

[@doctorbhanuprakash]

Wow, thank you!

[@suryasreeungarala1425]

Very clear and detailed explanation sir so much impressed and worth watching

[@doctorbhanuprakash]

So nice of you

[@Liha_here]

Really awesome ...lectures by you sir

[@doctorbhanuprakash]

Tysm

[@madhurabedekar7799]

excellent videos, explanation

[@ShahidHussain-zy1ye]

Sir appp jaisa quality wala faculty nahi mil sakta so many thanks full ❤❤❤❤love u sir❤❤❤

[@sweetie8484]

Thank you for this ❤️

[@Karthikmalle07]

Tq once again for this osm video 👏🙏

[@doctorbhanuprakash]

Most welcome 😊

[@MrJhonylyra]

Ty dr 😁

[@sugarhseok3597]

Thank you so much ❤ we really appreciate your efforts sir ❤

[@doctorbhanuprakash]

So nice of you

[@rakibsk4295]

Now confusion is out ❤️

[@user-nz9yh4io9j]

Thank u sir

[@doctorbhanuprakash]

So nice of you

[@bozenajencek]

thank you for a lecture

[@doctorbhanuprakash]

Glad it was helpful!

[@bozenajencek]

@@doctorbhanuprakash Stay together....

[@Recation2512]

Can i get notes of this lecture

[@karishmarawat6510]

During expiration the thoracic volume should be less than resting lungs volume ..if not then how it is possible that the intrapulmonary pressure increases to 761mm Hg

[@SurajSingh-wi9vd]

Expiration initiated by muscle so pressure increases due to which expiration occurs