Question

(I)breathing Involves in the movement of the ______and the______ (ii). during inhalation the ribs move____ and the diaphragm moves ____ (iii) the percentage of oxygen in inhaled air is __________and that in exhaled air is ________.please answer one by one

Answer 1

Heya,

Breathing involves in the movement of the ribs and the lungs. during inhalation the ribs moves outwards and the diaphragm moves downward. The percentage of oxygen inhaled air is 20.84% and that in exhaled air is 13.60%.

(1) Ribs
(2) Lungs
(3) Outwards
(4) Downwards
(5) 20.84%
(6) 13.60%

Hope this helps....:)