| Bone: Radius (joint) | |
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| Upper extremity | |
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| Radius is #1 | |
| Gray's | subject #52 219 |
| MeSH | Radius |
The radius is the bone of the forearm that extends from the lateral side of the elbow to the thumb side of the wrist. Introduction ( classes Long bones body or Diaphysis Medullary canal Medical Subject Headings ( MeSH) is a huge Controlled vocabulary (or metadata system for the purpose of indexing journal articles and books Bones are rigid organs that form part of the Endoskeleton of Vertebrates They function to move support and protect the various organs of the body produce The forearm is the structure on the Upper limb, between the elbow and the Wrist. The elbow is the region surrounding the elbow-joint&mdashthe ginglymus or Hinge joint in the middle of the Arm. The thumb is the medial -most digit of the hand The English adjective for thumb is pollical In Human anatomy, the wrist is the flexible and narrower connection between the Forearm and the palm. The radius is situated on the lateral side of the ulna, which exceeds it in length and size. The ulna ( elbow bone) is a long bone prismatic in form placed at the medial side of the Forearm, parallel with the radius. It is a long bone, prismatic in form and slightly curved longitudinally. General right and uniform prisms A right prism is a prism in which the joining edges and faces are perpendicular to the base faces The radius articulates with the capitulum of the humerus. The humerus is a Long bone in the Arm or Forelimb that runs from the Shoulder to the Elbow.
The word "radius" is Latin for "ray. Latin ( lingua Latīna, laˈtiːna is an Italic language, historically spoken in Latium and Ancient Rome. " In the context of the radius bone, a ray can be thought of rotating around an axis line extending diagonally from centre of capitulum to the centre of distal ulna. 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. The ulna ( elbow bone) is a long bone prismatic in form placed at the medial side of the Forearm, parallel with the radius.
It has a body and two extremities:
Contents |
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 body of the radius (or shaft of radius) is prismoid in form narrower above than below and slightly curved so as to be convex lateralward The upper extremity of the radius (or proximal extremity) presents a head neck and tuberosity The distal end of the radius is large and of quadrilateral form Cortical bone, or compact bone, is one of two main types of Osseous tissue.
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. A trabecula (plural trabeculae. From Latin for small beam. is a small often microscopic tissue element in the form of a small beam
The arrangement at the lower end is somewhat similar.
See also
Additional images
 Radius l. Bones are rigid organs that form part of the Endoskeleton of Vertebrates They function to move support and protect the various organs of the body produce In fields of Anatomy, anatomical terms of location are descriptive terms to help identify relative positions or directions within a species This article needs more context around or a better explanation of technical details to make it more accessible to general readers dx. - ant. view |
 Radius l. dx. - post. view |
 Right human radius and ulna - post. view |
 Human arm bones diagram |
 Bones of left forearm - ant. view |
 Bones of left forearm - post. view |
 Left elbow-joint, showing anterior and ulnar collateral ligaments |
 The Supinator |
 Cross-section through middle of forearm |
 Transverse section across distal ends of radius and ulna |
External links
This article was originally based on an entry from a public domain edition of Gray's Anatomy. The public domain is a range of abstract materials &ndash commonly referred to as Intellectual property &ndash which are not owned or controlled by anyone Henry Gray's Anatomy of the Human Body (or Gray's Anatomy as it has commonly been shortened is an English-language Human anatomy Textbook As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.
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