1. Are the lungs identical?
No, the right lung is shorter than the left by 1 inch; however, its total capacity is greater. The right lung has three lobes, the left lung has two. The maximum capacity of the lung averages about 6,500 cubic centimeters (cc) or 1.7 gallons (6.4 liters). back to questions

2. Why does the human voice sound so strange after breathing helium? Since the speed of sound in helium is nearly three times the speed of sound in air, the pitch of the human voice becomes correspondingly higher. back to questions