Question

why are lungs divided into very small sac like structures

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Answer 1

⭕️Lungs are divided into small sac like structures called alveoli to increase the surface area for exchange of gases between lungs and blood.


⭕️Lungs are divided into bronchitis and then further divided into bronchioles.


⭕️These bronchioles* are further divided into small sac like structures called as alveoli**


⭕️carbon dioxide forms impure blood.
So it's brought to lungs and this will be getting replaced with oxygen and this oxygen is absorbed by capillaries*** that are present at the surface of the alveoli and then circulated in the body through blood.



✔️✔️**bronchioles are a very minute branches which a bronchus divides.


✔️✔️**alveoli help in increasing the surface area so that the gaseous exchange takes place efficiently.


✔️✔️***smallest tubes in the body that carry blood and they're as thin as like our hair!




$\huge\bf{\underline{\mathfrak{thank \: you :)}}}$