Lacrimal bone

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Lacrimal Bone

The Lacrimal Bone (pronounced: /ˈlækrɪməl/), also known as the os lacrimale, is a small and fragile bone of the facial skeleton. It is roughly rectangular in shape and contributes to the medial wall of the orbit and the lateral wall of the nasal cavity.

Etymology

The term "lacrimal" is derived from the Latin word "lacrima" which means "tear". This is due to the bone's close association with the lacrimal apparatus, which is responsible for the production and drainage of tears.

Anatomy

The lacrimal bone is the smallest bone in the face and is situated at the front part of the medial wall of the orbit. It has two surfaces and four borders. It articulates with the frontal, maxilla, ethmoid, and inferior nasal concha bones.

Related Terms

  • Lacrimal apparatus: The physiological system containing the orbital structures for tear production and drainage.
  • Lacrimal sac: The upper dilated end of the nasolacrimal duct, and it is located in the lacrimal fossa formed by the lacrimal bone and frontal process of maxilla.
  • Lacrimal duct: The passageway that drains excess tears into the nose.
  • Lacrimal fossa: A depression within the lacrimal bone that houses the lacrimal sac.

See Also

External links

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