Its exploded view is shown below.
Explanation of each part of the hand:
Carpal bone: It is a short bone, located near the hand bone. It has 8 pieces, divided into two rows, each row has 4 pieces, all named after its shape.
The carpal bones include the proximal rows of scaphoid, lunate, triangle and pisiform bone connected with the radius, and the distal rows of polygonal bones, polygonal bones, skull and hamate connected with the metacarpal bones.
Metacarpal bones: **5 pieces, which are small long bones. From the radial side to the ulnar side, the metacarpal bone is 1~5 in turn.
Thumb: usually refers to the first finger of the hand, and the thickest and shortest finger is the thumb, which helps us to carry things.
Finger joint: It consists of metacarpal capitulum and proximal phalanx (1 joint). The metacarpophalangeal joint of thumb belongs to trochlear joint, and the other four fingers are ball-and-socket joint.
Phalanges: In primates, the thumb has two sections, and all other fingers have three phalanges. From proximal to distal, phalanx is 1 (proximal phalanx), phalanx is 2 (middle phalanx) and phalanx is 3 (distal phalanx). The phalanx is a small long bone, which belongs to the appendage bone.
Extended data:
1, long bone
Shaped like a long tube, divided into two ends. The body is also called the spine, and there is a cavity in it to contain bone marrow, which is called the bone marrow cavity.
Enlargement at both ends is called epiphysis.
Articular cartilage is attached to the epiphyseal surface to form articular surface.
The part of the diaphysis adjacent to the epiphysis is called the metaphyseal end, a piece of cartilage left in childhood is called the epiphyseal cartilage, and a line left by ossification in adulthood is called the epiphyseal line.
2. Short bones
Shaped like a cube, most of them are distributed in groups in firmly connected and slightly elastic parts, such as the wrist, the back half of the foot and the spine.
Able to withstand greater pressure, there are often multiple joint surfaces to form a micro-motion joint.
Reference source: Baidu Encyclopedia-Bones