EVERYDAY SCIENCE

Detailed explanation-1: -In humans the five metacarpals are flat at the back of the hand and bowed on the palmar side; they form a longitudinal arch that accommodates the muscles, tendons, and nerves of the palm. The metacarpals also form a transverse arch that allows the fingertips and thumb to be brought together for manipulation.

Detailed explanation-2: -The metacarpal bones are five long bones of the hand between the carpal bones and the proximal phalanges of the hand that make up most of the palm.

Detailed explanation-3: -Your wrist is made up of eight small bones (carpal bones) plus two long bones in your forearm-the radius and the ulna. Each finger consists of one hand bone (metacarpal) and three finger bones (phalanges), while each thumb consists of one metacarpal bone and two phalanges.

Detailed explanation-4: -The carpal bones are bones of the wrist that connect the distal aspects of the radial and ulnar bones of the forearm to the bases of the five metacarpal bones of the hand. There are eight carpal bones, which divide into two rows: a proximal row and a distal row.

Detailed explanation-5: -The first metacarpal bone or the metacarpal bone of the thumb is the first bone proximal to the thumb. It is connected to the trapezium of the carpus at the first carpometacarpal joint and to the proximal thumb phalanx at the first metacarpophalangeal joint.