The term "posterior" is used in biology and zoology to refer to structures located away from the mouth in animals. This term is commonly used to describe the direction or location of body parts in relation to the mouth.
Aposematism
Stoma is the medical term for mouth or opening.
stomatitis
The medical term for the bones of the roof of the mouth is "palate."
Stomatalgia is the medical term meaning mouth pain.
Orogastric
There really is no antonym for the word zoology. There is nothing that has an "opposite" meaning.
Extraoral is the medical term meaning outside the mouth.
PHARNX
Pharynx is the medical term meaning throat.Pharynxpharynx
Retropharyngeal is the medical term meaning behind the pharynx.