you tell me
The two facial muscles that are circular are the Orbicularis Oculi(around eye), and the Orbicularis Oris(around mouth).
The two kinds of adaptations an organism can have is a behavioral or a physical adaptation. These both help the organism survive.
We have two ears and one mouth.
Yes.
Hollow, insulating fur and webbed feet are two functional adaptations of Polar bears.
stuff your mouth in it and chew and then swallow.
Co-evolution
Their shell also known as the Elytra.
Structural and Behavioral
No you cannot it is impossible to produce two different sounds from your mouth at the same time.
Dry mouth is a common (and sometimes severe) problem. It is when the mouth fails to provide enough saliva. Two symptoms include tooth decay, and lack of saliva.
It is a male fighting tooth. It's main function for the horse is to do damage to his opponent in a fight. There are normally four of them. Two are located in the upper jaw and two in the lower jaw. They are found in the interdental space of the mouth. This is the part of the mouth between the incisors and molars also called the bars of the mouth. The canines are usually about an inch (2.5cm) or so behind the corner incisors. The bottom two on the lower jaw tend to get quite long and sharp. They are deeply rooted teeth and very strong.