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: Mechanical Properties, Cellular Structure, Types, Formation, Remodeling, Paracrine Cell Signalling, Disorders, Osteology, Alternatives To Bony Endoskeletons, Exposed Bone, Uses, Terminology
Other articles related to "bone, bones":
... This bone, collected in 1893, was first identified as the thighbone of a crocodilian, but was described in 1903 by Samuel Wendell Williston as ... on the 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) ...
... signaling plays a key role in the maintenance of bone mass ... Another important effect is that CB2 agonists attenuates ovariectomy-induced bone loss while increasing cortical thickness ...
... 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 bone ... articulation The region where adjacent bones contact each other — a joint ... foramen An opening through a bone ...
... 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 ... by immune cells also have important effects on regulating bone homeostasis ... TNFa, ILs, and IFNs, affect the differentiation and activity of osteoclasts and bone resorption ...
... 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 ...
Famous quotes containing the word bone:
“Fowls in the frith,
Fishes in the flood,
And I must wax wod:
Much sorrow I walk with
For best of bone and blood.”
—Unknown. Fowls in the Frith. . .
Oxford Book of Short Poems, The. P. J. Kavanagh and James Michie, eds. Oxford University Press.
“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 (18621933)