Graphics Reference
In-Depth Information
FIG 5.6
The elbow joint. a: Posterior
view. b: Anterior view.
(a)
(b)
The Wrist and the Hand
The most dexterous part of the human body, one capable of the widest
and most complex movements, is located within the wrists and hands. This
dexterity is a result of the number and complexity of individual bones and
joints that make up the hand and wrist. This complicated structure not only
allows for dexterous movement; it also provides strength and allows for a high
degree of shock absorption. The structure may look delicate and fragile, but
the hands are extremely strong and are capable of taking high levels of stress
and sustaining heavy impacts. This combination of dexterity and strength
makes us capable of using a wide range of tools.
The radius and the ulna are attached to the wrist joint, which is made
up of two rows of four carpal bones. This structure provides a degree of
articulation between the separate bones as well as between the two rows of
bones.
The lower row of bones connects with the separate metacarpals. These in turn
connect with the phalanges.
