Which bones are knuckles

The human hand consists of a broad palm metacarpus with 5 digits, attached to the forearm by a joint called the wrist carpus. The four fingers on the hand are used for the outermost performance; these four digits can be folded over the palm which allows the grasping of objects.

Each finger, starting with the one closest to the thumb, has a colloquial name to distinguish it from the others. The human hand has 27 bones: the carpals or wrist accounts for 8; the metacarpals or palm contains five; the remaining fourteen are digital bones; fingers and thumb.

The palm has five bones known as metacarpal bones, one to each of the 5 digits. These metacarpals have a head, a shaft, and a base. Human hands contain fourteen digital bones, also called phalanges, or phalanx bones: two in the thumb the thumb has no middle phalanx and three in each of the four fingers.

These are the distal phalanx, carrying the nail, the middle phalanx, and the proximal phalanx. Sesamoid bones are small ossified nodes embedded in the tendons to provide extra leverage and reduce pressure on the underlying tissue. Many exist around the palm at the bases of the digits; the exact number varies between different people.

The joints are enclosed by a fibrous capsule that is lined with a thin membrane called the synovium, which secretes a fluid to lubricate the joints. The ligaments are tough bands of connective tissue that connect the bones to support them and keep them in place.

Important ligaments of the hand are:. Tendons are bands of connective tissue that attach the muscles to the bone enabling the muscles to move the bones. Get involved with the arthritis community. Every gift to the Arthritis Foundation will help people with arthritis across the U. Join us and become a Champion of Yes. There are many volunteer opportunities available. Take part to be among those changing lives today and changing the future of arthritis.

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Currently this program is for the adult arthritis community. Since the needs of the juvenile arthritis JA community are unique, we are currently working with experts to develop a customized experience for JA families. The 14 bones that are found in the fingers of each hand and also in the toes of each foot. Each finger has 3 phalanges the distal, middle, and proximal ; the thumb only has 2. Carpal bones. The 8 bones that create the wrist.

The 2 rows of carpal bones are connected to 2 bones of the arm--the ulna bone and the radius bone. Numerous muscles, ligaments, tendons, and sheaths can be found within the hand.