the carbon minoxide releases itsself in to your hand causing it to feel warm
With a smaller mouth opening the air moves faster and 'wind chill' cools your hand.
In protostome ("first mouth") the blastopore, or the first opening formed becomes the mouth. In deuterostomes ("second mouth"), the blastopore forms the anus and the mouth develops from a second opening.
An opening through which air or water can flow is a mouth. This can refer to the mouth of a river or a person or animal's mouth.
Trismus is restruction of the opening of the mouth due to spasm.
From your mouth
It's that opening in our heads that contains teeth and which we use for eating and talking. There is also the mouth of a river, where the water flows into the sea, or the mouth of a cave, which is an opening into it (metaphorically like a human mouth).
The opening is called an estuary.
The pharynx is the narrow opening at the back of the mouth. It is part of both the digestive system and the respiratory system.
roundworms have 2 body opening. The mouth and the anus
The mouth is only one opening into the human body.
The mouth.
Stoma is the medical term for mouth or opening.