User Forum

Ask Your Question

ashok tyagi from ,

Subject :NSO Class : Class 7

Alveoli present in lungs

A increase the surface tension
B are few hundred in number
C have limited blood supply
D increase the surface area.

Ans 1:

Soumalya mallick from St. Stephens School, Kolkata

Class : Class 6

the answer is b

Aditya kumar from Sapphire International School, Noida

Class : Class 8

ITS OPTION "D" as it increases surface area for intake of more oxygen