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Thứ Năm, 5 tháng 5, 2016

Posted by Quyen Quyen in | 21:24 No comments
A finger is an arm or leg of the body and also a type of number, a body organ of manipulation and sensation located in the hands of humans and other primates. [1] [2] Generally people have 5 figures, the bones which are called phalanges, [2] on each hand, although some people have a lot more or less compared to five because of genetic conditions such as polydactyly or oligodactyly, or unintended or clinical amputations. The initial number is the thumb, complied with by index finger, middle finger, ring finger, as well as little finger or pinky. Baseding on various interpretations, the thumb can be called a finger, or otherwise.
The thumb (linked to the trapezium) is located on one of the sides, alongside the arm.

The palm has actually five bones known as metacarpal bones, one to each of the 5 figures. Human hands contain fourteen digital bones, likewise called phalanges, or phalanx bones: 2 in the thumb (the thumb has no center phalanx) and three in each of the four fingers. These are the distal phalanx, lugging the nail, the middle phalanx, and the proximal phalanx.

Sesamoid bones are little ossified nodes installed in the tendons to offer extra leverage and reduce pressure on the underlying tissue. Lots of exist around the hand at the bases of the digits; the precise number ranges various people.

The expressions are: interphalangeal articulations in between phalangeal bones, and metacarpophalangeal joints linking the phalanges to the metacarpal bones.

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