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Radius (bone)

 
Radius (bone)

 
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Radius (bone)
 
 
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The radius is the bone
Bone

Bones are rigid organ that form part of the endoskeleton of vertebrates. They function to move, support, and protect the various organs of the body, produce red blood cell and white blood cells and store minerals....
 of the forearm
Forearm

The forearm is the structure on the upper limb, between the Elbow-joint and the wrist.. This term is used in anatomy to distinguish it from the arm ....
 that extends from the lateral side of the elbow to the thumb
Thumb

The thumb is the Human_anatomical_terms#Anatomical_directions-most finger of the hand. The English adjective for thumb is pollical....
 side of the wrist
Wrist

In human anatomy, the wrist is the flexible and narrower connection between the forearm and the hand. The wrist is essentially a double row of small short bones, called carpals, intertwined to form a malleable hinge....
. The radius is situated on the lateral side of the ulna
Ulna

The ulna is a long bone, prism atic in form, placed at the Anatomical terms of location#Relative directions side of the forearm, parallel with the radius ....
, which exceeds it in length and size. It is a long bone, prism
Prism (geometry)

In geometry, an n-sided prism is a polyhedron made of an n-sided polygon base, a Translation copy, and n faces joining corresponding sides....
-shaped and slightly curved longitudinally. The radius articulates with the capitulum of the humerus
Humerus

The humerus is a long bone in the arm or forelimb that runs from the shoulder to the elbow.Anatomically, it connects the scapula and the ulna, and consists of the following three sections:...
.

The word "radius" is Latin for "ray." In the context of the radius bone, a ray can be thought of rotating around an axis line extending diagonally from centre of capitulum
Capitulum of the humerus

In human anatomy of the arm, the lateral portion of the articular surface of the humerus consists of a smooth, rounded eminence, named the capitulum of the humerus....
 to the centre of distal ulna
Ulna

The ulna is a long bone, prism atic in form, placed at the Anatomical terms of location#Relative directions side of the forearm, parallel with the radius ....
.

The radius has a body and two extremities:










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The radius is the bone
Bone

Bones are rigid organ that form part of the endoskeleton of vertebrates. They function to move, support, and protect the various organs of the body, produce red blood cell and white blood cells and store minerals....
 of the forearm
Forearm

The forearm is the structure on the upper limb, between the Elbow-joint and the wrist.. This term is used in anatomy to distinguish it from the arm ....
 that extends from the lateral side of the elbow to the thumb
Thumb

The thumb is the Human_anatomical_terms#Anatomical_directions-most finger of the hand. The English adjective for thumb is pollical....
 side of the wrist
Wrist

In human anatomy, the wrist is the flexible and narrower connection between the forearm and the hand. The wrist is essentially a double row of small short bones, called carpals, intertwined to form a malleable hinge....
. The radius is situated on the lateral side of the ulna
Ulna

The ulna is a long bone, prism atic in form, placed at the Anatomical terms of location#Relative directions side of the forearm, parallel with the radius ....
, which exceeds it in length and size. It is a long bone, prism
Prism (geometry)

In geometry, an n-sided prism is a polyhedron made of an n-sided polygon base, a Translation copy, and n faces joining corresponding sides....
-shaped and slightly curved longitudinally. The radius articulates with the capitulum of the humerus
Humerus

The humerus is a long bone in the arm or forelimb that runs from the shoulder to the elbow.Anatomically, it connects the scapula and the ulna, and consists of the following three sections:...
.

The word "radius" is Latin for "ray." In the context of the radius bone, a ray can be thought of rotating around an axis line extending diagonally from centre of capitulum
Capitulum of the humerus

In human anatomy of the arm, the lateral portion of the articular surface of the humerus consists of a smooth, rounded eminence, named the capitulum of the humerus....
 to the centre of distal ulna
Ulna

The ulna is a long bone, prism atic in form, placed at the Anatomical terms of location#Relative directions side of the forearm, parallel with the radius ....
.

The radius has a body and two extremities:

  • Body of radius
    Body of radius

    The body of the Radius is prismoid in form, narrower above than below, and slightly curved, so as to be convex lateralward. It presents three borders and three surfaces....
  • Upper extremity of radius
    Upper extremity of radius

    The upper extremity of the Radius presents a head, neck, and tuberosity.* The radial head has a cylindrical form, and on its upper surface is a shallow cup or fovea for articulation with the Capitulum of the humerus of the humerus....
  • Lower extremity of radius
    Lower extremity of radius

    The distal end of the Radius is large and of quadrilateral form....


Structure

The long narrow medullary cavity is enclosed in a strong wall of compact bone which is thickest along the interosseous border and thinnest at the extremities except over the cup-shaped articular surface (fovea) of the head where it is thickened.

The trabeculae of the spongy tissue are somewhat arched at the upper end and pass upward from the compact layer of the shaft to the fovea capituli; they are crossed by others parallel to the surface of the fovea.

The arrangement at the lower end is somewhat similar.

See also

  • Bone terminology
    Bone

    Bones are rigid organ that form part of the endoskeleton of vertebrates. They function to move, support, and protect the various organs of the body, produce red blood cell and white blood cells and store minerals....
  • Terms for anatomical location
  • Ossification of radius
    Ossification of radius

    The radius is one of the two bones in the forearm.The radius is ossified from three centers: one for the body, and one for either extremity. That for the body makes its appearance near the center of the bone, during the eighth week of fetal life....


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