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...
![Selective Breeding](https://www.biologyonline.com/wp-content/uploads/2020/02/Selective-Breeding-252x168.jpg)
Selective Breeding
Gregor Mendel's studies into Monohybrid and Dihybrid crossing and Charles Darwin's study of evolution and natural select..
![Cambial cells](https://www.biologyonline.com/wp-content/uploads/2020/02/Plant-Tissues-253x168.jpg)
Plant Tissues
Plant organs are comprised of tissues working together for a common function. The different types of plant tissues are m..
![Human perception in action](https://www.biologyonline.com/wp-content/uploads/2020/02/Human-Perception-Neurology-252x168.jpg)
Human Perception – Neurology
This tutorial investigates perception as two people can interpret the same thing differently. Know more about human perc..
![human brain structure](https://www.biologyonline.com/wp-content/uploads/2020/02/The-Conscious-Unconscious-Nervous-System-205x168.jpg)
The Conscious & Unconscious Nervous System
This tutorial elaborates on how the nervous system works, particularly at the tissue level of the brain. There are three..
![An artist depiction of a Precambrian multicellular life form.](https://www.biologyonline.com/wp-content/uploads/2020/02/The-Evolution-of-Cell-Organelles-224x168.jpg)
The Evolution of Cell Organelles
The nucleus containing the genetic material, DNA, and the mitochondria, well-identified as the "powerhouse of the cell",..
![Lotic community of algal species](https://www.biologyonline.com/wp-content/uploads/2020/02/Lotic-Communities-Algae-252x168.jpg)
Lotic Communities & Algae
Lotic communities have conditions that are rather harsh for typical plants. Thus, the diversity of plant species in loti..