Bone | Wikipedia audio article
Channel: wikipedia tts
Date: 2019-05-06

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Bone


00:02:10 1 Structure
00:03:36 1.1 Cortical bone
00:05:11 1.2 Cancellous bone
00:07:25 1.3 Bone marrow
00:08:11 1.4 Bone cells
00:09:07 1.4.1 Osteoblast
00:10:45 1.4.2 Osteocyte
00:11:36 1.4.3 Osteoclast
00:12:56 1.5 Extracellular matrix
00:17:20 1.5.1 Deposition
00:18:31 1.6 Types
00:20:56 1.7 Terminology
00:22:38 2 Development
00:26:55 3 Function
00:27:08 3.1 Mechanical
00:29:01 3.2 Synthetic
00:30:25 3.3 Metabolic
00:32:50 3.4 Remodeling
00:36:12 3.5 Bone volume
00:37:37 4 Clinical significance
00:39:01 4.1 Fractures
00:41:02 4.2 Tumors
00:41:29 4.3 Cancer
00:43:55 4.4 Painful conditions
00:44:44 4.5 Osteoporosis
00:46:34 4.6 Osteopathic medicine
00:47:08 5 Osteology
00:48:06 6 Other animals
00:49:47 7 Society and culture
00:52:24 8 Additional images
00:52:33 9 See also



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SUMMARY
=======
A bone is a rigid organ that constitutes part of the vertebrate skeleton. Bones protect the various organs of the body, produce red and white blood cells, store minerals, provide structure and support for the body, and enable mobility. Bones come in a variety of shapes and sizes and have a complex internal and external structure. They are lightweight yet strong and hard, and serve multiple functions.
Bone tissue (osseous tissue) is a hard tissue, a type of dense connective tissue.  It has a honeycomb-like matrix internally, which helps to give the bone rigidity.  Bone tissue is made up of different types of bone cells. Osteoblasts and osteocytes are involved in the formation and mineralization of bone; osteoclasts are involved in the resorption of bone tissue. Modified (flattened) osteoblasts become the lining cells that form a protective layer on the bone surface. The mineralised matrix of bone tissue has an organic component of mainly collagen called ossein and an inorganic component of bone mineral made up of various salts. Bone tissue is a mineralized tissue of two types, cortical bone and cancellous bone. Other types of tissue found in bones include bone marrow, endosteum, periosteum, nerves, blood vessels and cartilage.
In the human body at birth, there are over 270 bones, but many of these fuse together during development, leaving a total of 206 separate bones in the adult,  not counting numerous small sesamoid bones. The largest bone in the body is the femur or thigh-bone, and the smallest is the stapes in the middle ear.
The Greek word for bone is ὀστέον ("osteon"), hence the many terms that use it as a prefix – such as osteopathy.