| head of femur | The hemispheric articular surface at the upper extremity of the thigh bone. Synonym: caput ossis femoris, caput femoris, head of thigh bone. (05 Mar 2000) |
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| head of fibula | The superior extremity of the fibula, which articulates by a facet with the undersurface of the lateral condyle of the tibia. Synonym: caput fibulae, upper extremity of fibula. (05 Mar 2000) |
| head of humerus | The upper rounded extremity fitting into the glenoid cavity of the scapula. Synonym: caput humeri. (05 Mar 2000) |
| head of malleus | The rounded portion of the malleus articulating with the body of the incus. Synonym: caput mallei. (05 Mar 2000) |
| head of mandible | The expanded articular portion of the condylar process of the mandible. Synonym: caput mandibulae. (05 Mar 2000) |
| head of metacarpal bone | The expanded distal end of a metacarpal that articulates with the proximal phalanx of the same digit. Synonym: caput ossis metacarpalis. (05 Mar 2000) |
| head of metatarsal bone | The expanded distal end of a metatarsal bone that articulates with the proximal phalanx of the same digit. Synonym: caput ossis metatarsalis. (05 Mar 2000) |
| head of pancreas | That portion of the pancreas lying in the concavity of the duodenum. Synonym: caput pancreatis. (05 Mar 2000) |
| head of phalanx | The rounded articular surface at the distal end of the proximal and middle phalanx of each finger and toe. Synonym: caput phalangis, trochlea phalangis. (05 Mar 2000) |
| head of radius | The disk-shaped upper extremity articulating with the capitulum of the humerus. Synonym: caput radii. (05 Mar 2000) |
| head of rib | The rounded medial extremity of a rib which, except for ribs 1, 10, 11, and 12, articulates by two facets with the bodies of two contiguous vertebrae. Synonym: caput costae. (05 Mar 2000) |
| head of stapes | The portion of the stapes that articulates with the lenticular process of the incus. Synonym: caput stapedis. (05 Mar 2000) |
| head of talus | The rounded anterior portion of the talus articulating with the navicular bone. Synonym: caput tali. (05 Mar 2000) |
| head of the caudate nucleus | The head or anterior extremity of the caudate nucleus projecting into the anterior horn of the lateral ventricle. Synonym: caput nuclei caudati, anterior extremity of caudate nucleus. (05 Mar 2000) |
| head of ulna | The small rounded distal extremity of the ulna articulating with the ulnar notch of the radius and the articular disk. Synonym: caput ulnae. (05 Mar 2000) |