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Encyclopedia > Irregular bone
Irregular bone
Latin os irregulare
Gray's subject #17 80
Dorlands/Elsevier o_07/12598430

The irregular bones are such as, from their peculiar form, cannot be grouped as long bone, short bone, or flat bone. Irregular bones serve a unique purpose in the body of combining: (1) protection of nervous tissue (such as the vertebrae protect the spinal cord), (2) affording multiple anchor points for skeletal muscle attachment (as with the sacrum) , and maintaining pharynx and trachea support, and tongue attachment (such as the hyoid bone). Latin is an ancient Indo-European language originally spoken in Latium, the region immediately surrounding Rome. ... Elseviers logo Elsevier, the worlds largest publisher of medical and scientific literature, forms part of the Reed Elsevier group. ... The long bones are those that grow primarily by elongation at an epiphysis at one end of the growing bone. ... Flat Bones. ... A diagram of a thoracic vertebra. ... The Spinal cord nested in the vertebral column. ... A top-down view of skeletal muscle Skeletal muscleis a type of striated muscle, attached to the skeleton. ... Image of pelvis. ... The pharynx (plural: pharynges) is the part of the neck and throat situated immediately posterior to the mouth and nasal cavity, and cranial to the esophagus, larynx, and trachea. ... Windpipe redirects here. ... Tongue The tongue is the large bundle of muscles on the floor of the mouth that manipulates food for chewing and swallowing. ... The hyoid bone (Os Hyoideum; Lingual Bone) is a bone in the human neck, not articulated to any other bone; it is supported by the muscles of the neck and in turn supports the root of the tongue. ...


They consist of cancellous tissue enclosed within a thin layer of compact bone. Cortical bone is one of two main types of bone. ...


The irregular bones are: the vertebræ, sacrum, coccyx, temporal, sphenoid, ethmoid, zygomatic, maxilla, mandible, palatine, inferior nasal concha, and hyoid. Image of pelvis. ... The coccyx is formed of four fused vertebrae. ... For alternate uses of time, see Time (disambiguation) or see TIME (magazine). ... The sphenoid bone (os sphenoidale) is a bone situated at the base of the skull in front of the temporals and basilar part of the occipital. ... The ethmoid bone (os ethmoidale) is a bone in the skull that separates the nasal cavity from the brain. ... The zygomatic bone (also known as the zygoma; Os Zygomaticum; Malar Bone) is a paired bone of the human skull. ... The maxillae are the largest bones of the face, except for the mandible, and form, by their union, the whole of the upper jaw. ... It has been suggested that this article or section be merged with jaw. ... See Palatine Hill for geography of Rome. ... The inferior nasal concha (Concha Nasalis Inferior; Inferior Turbinated Bone) extends horizontally along the lateral wall of the nasal cavity [Fig. ... The hyoid bone (Os Hyoideum; Lingual Bone) is a bone in the human neck, not articulated to any other bone; it is supported by the muscles of the neck and in turn supports the root of the tongue. ...


There are five general classifications of bones: (1) Long bones, (2) Short bones, (3) Flat bones, (4) Irregular bones, and (5) Sesamoid bones. The long bones are those that are longer than they are wide, and grow primarily by elongation of the diaphysis at an epiphysis at one end of the growing bone. ... Where a part of the skeleton is intended for strength and compactness combined with limited movement, it is constructed of a number of short bones, as in the carpus and tarsus. ... Flat Bones. ...



Reference:

  • Stedman's Online Medical Dictionary, 27th Edition

This article was originally based on an entry from a public domain edition of Gray's Anatomy. 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. The public domain comprises the body of all creative works and other knowledge—writing, artwork, music, science, inventions, and others—in which no person or organization has any proprietary interest. ... An illustration from the 1918 edition Henry Grays Anatomy of the Human Body, commonly known as Grays Anatomy, is an anatomy textbook widely regarded as a classic work on human anatomy. ...

Bone and cartilage - edit
cartilage: chondroblast, chondrocyte, perichondrium, types (hyaline, elastic, fibrous), fibrocartilage callus, metaphysis

bone: ossification (intramembranous, endochondral, epiphyseal plate), cycle (osteoblast, osteoid, osteocyte, osteoclast), types (cancellous, cortical), regions (epiphysis, diaphysis), structure (osteon/Haversian system, Haversian canals, periosteum, Sharpey's fibres, lacunae, canaliculi, trabeculae, medullary cavity, bone marrow), shapes (long, short, flat, irregular, sesamoid) Grays illustration of a human femur, a typically recognized bone. ... Cartilage is a type of dense connective tissue. ... Cartilage is a type of dense connective tissue. ... A chondroblast is a cell, which originates from a mesenchymal stem cell and forms Chondrocytes, commonly known as cartilage cells. ... Chondrocytes (< Greek chondros cartilage + kytos cell) are the only cells found in cartilage. ... The perichondrium is a layer of dense connective tissue which surrounds the cartilage. ... Cartilage is type of dense connective tissue. ... Cartilage is type of dense connective tissue. ... Cartilage is type of dense connective tissue. ... A fibrocartilage callus is a temporary fibrocartilage callus which forms as bone attemps to heal a fracture. ... The metaphysis is the body of cartilage that separates the epiphyses and the diaphysis of long bones during growth. ... Grays illustration of a human femur, a typically recognized bone. ... Ossification is the process of bone formation, in which connective tissues, such as cartilage are turned to bone or bone-like tissue. ... Osteoblasts and osteoclasts on trabecula of lower jaw of calf embryo. ... Section of fetal bone of cat. ... The long bones are those that are longer than they are wide, and grow primarily by elongation of the diaphysis at an epiphysis at one end of the growing bone. ... An osteoblast (from the Greek words for bone and to build) is a mononucleate cell which produces a protein that produces osteoid. ... Osteoid is a protein mixture which is secreted by osteoblasts. ... An osteocyte, a star-shaped cell, is the most abundant cell found in bone. ... An osteoclast is a multinucleated cell that degrades and reabsorbs bone. ... Cancellous bone (or trabecular bone, or spongy bone) is a spongy type of bone with a very high surface area, found at the ends of long bones. ... Cortical bone is one of two main types of bone. ... For other uses of the word bone, see bone (disambiguation). ... The diaphysis is the main or mid section (shaft) of a long bone. ... Osteons (cross section) Osteons (also called Haversian system in honor of Clopton Havers) are predominant structures found in some lamellar or compact bone. ... Haversian canals are a series of tubes around narrow channels formed by lamellae. ... The periosteum is an envelope of fibrous connective tissue that is wrapped around the bone in all places except at joints (which are protected by cartilage). ... Canaliculi are small, microscopic canals between the various lacunae of ossified bone. ... Definition and etymology trabeculae. ... The medullary cavity is the central cavity of bone shafts where yellow marrow (adipose) is stored. ... Grays Anatomy illustration of cells in bone marrow. ... The long bones are those that grow primarily by elongation at an epiphysis at one end of the growing bone. ... Flat Bones. ... In anatomy, a sesamoid bone is a bone embedded within a tendon. ...


 
 

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