A bone is a rigid organ that constitutes part of the skeleton in most vertebrate animals. Bones protect the various other 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), which is also called bone in the uncountable sense of that word, is hard tissue, a type of specialized 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 mineralized 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 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 approximately 300 bones present; many of these fuse together during development, leaving a total of 206 separate bones in the ãdül†, 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. In anatomical terminology, including the Terminologia Anatomica international standard, the word for a bone is os (for example, os breve, os longum, os sesamoideum).
Archaeologists unearth ancient nose jewelry, made from human bone, amid Maya ruins in Mexico
By Claire Voon
(CNN) — Archaeologists working in the ruins of Palenque, an ancient city in the southeastern Mexican state of Chiapas, have found a centuries-old, intricately carved...
Made of dust and bone and imagination, Irréelle fears she’s not quite real. Only the finest magical thread tethers her to life—and to Miss Vesper. But for all her efforts to please her cruel creator, the thread is unraveling. Irréelle is forgetful as she gathers bone dust. She is slow returning...
25 Bone Puns That Everyone Will Find Humerus
Bone puns always tickle my funny bone. These are the best bone puns from all around the internet. Add your favorite bone pun in the comments!
bone puns
Where do you learn about bones?
Osteoclasst.
What do you call it when a skeleton is having a great...
Your funny bone is actually a nerve
The name "funny bone" comes from the humerus bone, which connects the shoulder to the elbow. However, that's not the source of the tingling sensation you feel when you bump your elbow just right. It's actually the result of the humerus bone coming into...
The Shadow and Bone Trilogy by Leigh Bardugo
Synopsis:
The original fantasy saga from #1 New York Times bestselling author Leigh Bardugo, the Shadow and Bone Trilogy is the story of Alina Starkov, a soldier in the kingdom of Ravka who discovers she possesses magical abilities. Training with...
The name "funny bone" comes from the humerus bone, which connects the shoulder to the elbow. However, that's not the source of the tingling sensation you feel when you bump your elbow just right. It's actually the result of the humerus bone coming into contact with the ulnar nerve, which is...