15. The apparatus in figure 2:27 can be used to demonstrate the mechanism of breathing in a mammal.
Cork
Baloon
Plunger Syringe barrel
Glass rod
Glass tube
(a) What structure in a mammal is represented by the following?
The rubber balloon?​

Why should the united state be concerned about air pollution in china?

The oxidizing agent our bodies use to obtain energy from food is oxygen (from the air). if you breathe 15 times a minute (at rest), taking in and exhaling 0.5 l of air with each breath, what volume of air do you breathe each day? air is 21% oxygen by volume. what volume of oxygen do you breathe each day?

Describe two recent or ongoing space missions.