What is bone?

  • (noun): Rigid connective tissue that makes up the skeleton of vertebrates.
    Synonyms: os
    See also — Additional definitions below


Bones are rigid organs that constitute part of the endoskeleton of vertebrates. They support and protect the various organs of the body, produce red and white blood cells and store minerals. Bone tissue is a type of dense connective tissue. Bones come in a variety of shapes and have a complex internal and external structure, are lightweight yet strong and hard, and serve multiple functions. One of the types of tissue that makes up bone is the mineralized osseous tissue, also called bone tissue, that gives it rigidity and a coral-like three-dimensional internal structure. Other types of tissue found in bones include marrow, endosteum, periosteum, nerves, blood vessels and cartilage. At birth, there are over 270 bones in an infant human's body, but many of these fuse together as the child grows, leaving a total of 206 separate bones in an adult. The largest bone in the human body is the femur and the smallest bones are auditory ossicles.

Read more about Bone.

Some articles on bone:

Morphometrics - Applications - Bone Histomorphometry
... Histomorphometry of bone involves obtaining a bone biopsy specimen and processing of bone specimens in the laboratory, obtaining estimates of the proportional volumes and surfaces occupied by different ... Obtaining a bone biopsy is accomplished by using a bone biopsy trephine ...
... This bone, collected in 1893, was first identified as the thighbone of a crocodilian, but was described in 1903 by Samuel Wendell Williston as belonging to a pterosaur ... rocks of the Western Interior Seaway (including the Kiowa Shale) identifies the bone as more likely the upper part of a plesiosaurian propodial (a limb bone) ...
Cannabinoid Receptor - Physiology - Bone
... The endocannabinoid system through CB2 signaling plays a key role in the maintenance of bone mass ... effect is that CB2 agonists attenuates ovariectomy-induced bone loss while increasing cortical thickness ...
Bone - Terminology
... Several terms are used to refer to features and components of bones throughout the body Bone feature Definition articular process A projection that contacts an adjacent ... articulation The region where adjacent bones contact each other — a joint ... foramen An opening through a bone ...
Osteoimmunology - Crosstalk
... The bone marrow cavity is important for the proper development of the immune system, and houses important stem cells for maintenance of the immune system ... produced by immune cells also have important effects on regulating bone homeostasis ... IFNs, affect the differentiation and activity of osteoclasts and bone resorption ...

More definitions of "bone":

  • (noun): The porous calcified substance from which bones are made.
    Synonyms: osseous tissue
  • (adj): Consisting of or made up of bone.
    Example: "A bony substance"; "the bony framework of the body"
  • (verb): Remove the bones from.
    Example: "Bone the turkey before roasting it"
    Synonyms: debone

Famous quotes containing the word bone:

    Take adultery or theft.
    Merely sins.
    It is evil who dines on the soul,
    stretching out its long bone tongue.
    It is evil who tweezers my heart,
    picking out its atomic worms.
    Anne Sexton (1928–1974)

    the bone dry voices of the peepers
    as they throb like advertisements.
    Anne Sexton (1928–1974)

    People who love soft methods and hate iniquity forget this,—that reform consists in taking a bone from a dog. Philosophy will not do it.
    John Jay Chapman (1862–1933)