Skeletal System
Proximal Articular Facet of First Metacarpal Bone
Facies articularis proximalis ossis primi metacarpi
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The proximal articular facet of the first metacarpal bone is the saddle-shaped, superior area of its base. It articulates with the first metacarpal articular facet of the trapezium bone, contributing to the formation of the carpometacarpal joints.