The answer is -- A. A tube that extends from a bacterium
True. Aside from warming up, it's a given fact that safety equipment for some specific physical activities are known to lower the risk of getting injured. The most notable sport that need this is skateboarding, where a helmet and some pads are being used.
The answer to your problem is c
Lung diffusion is your ability to pass oxygen into the blood from the air sacs of the lungs, and pass carbon dioxide (CO2) back into the lungs from the blood.
