What are the two types of auxiliary cooling devices commonly found on fire apparatus?

Which of the following is the term used to describe the exchange of gas between lung units with different time constants?

a. Streaming b. Pendelluft c. Taylor-type dispersion d. Diffusion

The muscle that compresses the cheeks against the teeth and retracts the angle of the mouth is known as the

zygomatic minor muscle. frontalis muscle. orbicularis oris muscle. buccinator muscle.