orbicularis oris
(Science: anatomy, muscle) origin, by nasolabial band from septum of the nose, by superior incisive bundle from incisor fossa of maxilla, by inferior incisive bundle from lower jaw each side of symphysis; insertion, fibres surround mouth between skin and mucous membrane of lips and cheeks, and are blended with other muscles; action, closes lips; nerve supply, facial.
Synonym: musculus orbicularis oris, musculus sphincter oris, orbicular muscle of mouth, sphincter oris.
Dictionary > Orbicularis oris
You will also like...

Cell Respiration
Cell respiration is the process of creating ATP. It is "respiration" because it utilizes oxygen. Know the different stag..

Animal Growth Hormones
Hormones are produced in the endocrine glands of animals. The pituitary gland and hypothalamus are the most impor..

Dominance
This tutorial presents Gregor Mendel's law of dominance. Learn more about this form of inheritance and how it can be pre..

Abiotic and Biotic Factors
This tutorial deals with the abiotic factors of the freshwater environment that determine what sort of life would be sui..

Genetics and Evolution
Humans are diploid creatures. This means that for every chromosome in the body, there is another one to match it. Howeve..

Biological Viruses
Viruses possess both living and non-living characteristics. This unique feature distinguishes them from other organisms...