1.

CAFor Class 6 to 83.Why is there a difficulty in breathing at high altitudes?

Answer» <p>When webreathein airatsea level,theatmospheric pressureofabout 14.7 pounds per square inch (1.04 kg. per cm.2) causes oxygen to easily pass through selectively permeable lung membranes intotheblood.At high altitudes,thelower air pressure makesitmoredifficultfor oxygen to enter our vascular systems.</p>


Discussion

No Comment Found