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== Sesamoid ==

'''Sesamoid''' (pronunciation: /ˈsɛsəˌmɔɪd/) is a term used in [[anatomy]] to describe a type of [[bone]] that is embedded within a [[tendon]] or a [[muscle]]. It is derived from the Latin word "sesamum" due to the small size of most sesamoid bones, which are often comparable to a sesame seed.

=== Etymology ===

The term "sesamoid" is derived from the Latin word "sesamum", meaning "sesame seed". This is due to the small size of most sesamoid bones, which are often comparable to a sesame seed. The term was first used in this context in the 17th century.

=== Function ===

Sesamoid bones act like pulleys, providing a smooth surface for tendons to slide over, increasing the tendon's ability to transmit muscular forces. The presence of sesamoid bones in a body part implies that that body part is subject to high levels of mechanical stress.

=== Examples ===

The most well-known sesamoid bones are the [[patella]] (knee cap) and the two sesamoid bones in the [[foot]] located beneath the first [[metatarsal bone]]. Other sesamoid bones include the [[pisiform]] (smallest of the [[carpal bones]] in the hand), and the fabella, a small sesamoid bone found in some mammals behind the knee.

=== Related Terms ===

* [[Patella]]
* [[Tendon]]
* [[Muscle]]
* [[Metatarsal bone]]
* [[Pisiform]]
* [[Fabella]]

[[Category:Anatomy]]
[[Category:Orthopedics]]
[[Category:Medical Terminology]]

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