Skeletal system
Trapezoid bone
Os trapezoideum
- System
- Skeletal system
- Regions
- Upper limb, Hand
- Side
- Left and right
- Part of
- Bones of free part of upper limb
DescriptionUnreviewed
The trapezoid bone (lesser multangular bone) is a carpal bone in tetrapods, including humans.
It is the smallest bone in the distal row of carpal bones that give structure to the palm of the hand.
It may be known by its wedge-shaped form, the broad end of the wedge constituting the dorsal, the narrow end the palmar surface; and by its having four articular facets touching each other, and separated by sharp edges.
It is homologous with the "second distal carpal" of reptiles and amphibians.
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Names
- Latin
- Os trapezoideum
- English
- Trapezoid bone
- French
- Os trapèzoïde
- Spanish
- Hueso trapezoide
- Portuguese
- Osso trapézoide
In the same group
- Bones of hand
- Capitate bone
- Distal phalanx of fifth finger of hand
- Distal phalanx of first finger of hand
- Distal phalanx of fourth finger of hand
- Distal phalanx of second finger of hand
- Distal phalanx of third finger of hand
- Fifth metacarpal bone
- First metacarpal bone
- Fourth metacarpal bone
- Hamate bone
- Humerus
- Lunate bone
- Middle phalanx of fifth finger of hand
- Middle phalanx of fourth finger of hand
- Middle phalanx of second finger of hand
- Middle phalanx of third finger of hand
- Pisiform bone
- Proximal phalanx of fifth finger of hand
- Proximal phalanx of first finger of hand
- Proximal phalanx of fourth finger of hand
- Proximal phalanx of second finger of hand
- Proximal phalanx of third finger of hand
- Radius
- Scaphoid bone
- Second metacarpal bone
- Third metacarpal bone
- Trapezium bone
- Triquetrum bone
- Ulna