01 / Location & anatomical relationships
At the front of the lower jaw, below your bottom lip.
02 / Structure & organization
The mental prominence forms the anterior midline contour of the mandible. Skin, connective tissue and the mentalis muscle cover the bone. The mental nerve emerges through a foramen on either side to supply sensation to the chin and lower lip.
03 / Function
It is formed by the front of your lower jawbone.
04 / Mechanism
Bone gives the chin its shape, and skin and soft tissue cover it. When your jaw opens, your chin moves with it. Small muscles in this area also change the position of your lower lip.
Part of a bigger picture
The chin belongs in our head & face collection. Explore the nearby parts to see how this area of the body fits together.
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Connect structure with function
The chin is a surface region, not a separate bone. Its contour is related to mandibular shape, soft tissue thickness and lower-lip muscle activity.
Check your understanding
Locate the chin in relation to its neighbors. Explain how the structural features described above support its function, then distinguish it from a nearby structure with a different role.
Keep learning
Continue with OpenStax Anatomy and Physiology for system-level study. This atlas is educational and has not undergone independent medical peer review.