Quick Facts
Origin: Facial artery.
Course: Along the margin of the lower lip.
Branches: None.
Supplied Structures: Inferior labial glands, mucous membranes, and lower part of orbicularis oris muscle.
Related parts of the anatomy
Origin
The inferior labial artery arises from the facial artery as it nears the angle of the mouth. It is much smaller and less tortuous than the superior labial artery.
Course
The inferior labial artery passes anterosuperiorly, deep to the depressor anguli oris. It pierces the orbicularis oris to course along the margin of the lower lip, between the orbicularis oris and the mucous membrane of the lip.
Branches
There are no named branches.
Supplied Structures
The inferior labial artery supplies the inferior labial glands, the overlying mucous membrane, and the lower part of orbicularis oris muscle. Additionally, the inferior labial artery anastomosis with the submental arteries and the mental branch of the inferior alveolar artery, thus, supplying the chin and lower lip (Standring, 2016).
References
Standring, S. (2016) Gray's Anatomy: The Anatomical Basis of Clinical Practice. Gray's Anatomy Series 41 edn.: Elsevier Limited.
