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Bone Deutsch Evolutionary origin and significance VideoFalcon rising - Michael jai white - fight scene The radius or bot bone is one of the two large bones of the forearm, the other being the ulna. It extends from the lateral side of the elbow to the thumb side of the wrist and runs parallel to the ulna. The ulna is usually slightly longer than the radius, but the radius is thicker. Therefore the radius is considered to be the larger of the two. It is a long bone, prism-shaped and slightly curved longitudinally. The radius is part of two joints: the elbow and the wrist. At the elbow, it joins wit. Lernen Sie die Übersetzung für 'bone' in LEOs Englisch ⇔ Deutsch Wörterbuch. Mit Flexionstabellen der verschiedenen Fälle und Zeiten Aussprache und relevante Diskussionen Kostenloser Vokabeltrainer. This is our declaration! Zombies, cheerleaders, and werewolves stand together to protect the moon stone! 🎶 Watch the ZOMBIES 2 Cast perform “Flesh & Bone” i. The bone-rank system was the system of aristocratic rank used in the ancient Korean kingdom of Silla. It was used to segregate society, and particularly the layers of the aristocracy, on the basis of their hereditary proximity to the throne and the level of authority they were permitted to wield. In anatomy, the mandible, lower jaw or jawbone is the largest, strongest and lowest bone in the human facial skeleton. It forms the lower jaw and holds the lower teeth in place. The mandible sits beneath the maxilla. It is the only movable bone of the skull. It is connected to the temporal bone by the temporomandibular joint. The bone is formed in the fetus from a fusion of the left and right mandibular prominences, and the point where these sides join, the mandibular symphysis, is still visible.
Das besten an Bone Deutsch. - Beispiele aus dem PONS Wörterbuch (redaktionell geprüft)Gräte f. Viele übersetzte Beispielsätze mit "bone" – Deutsch-Englisch Wörterbuch und Suchmaschine für Millionen von Deutsch-Übersetzungen. in Linguee nachschlagen Sufficient bone depth and bone quality must be present for a successful anchoring of the implant in the bone The two-stage surgical procedure may be applied for patients with a bone. German Translation of “bone” | The official Collins English-German Dictionary online. Over , German translations of English words and phrases. A bone is a rigid organ that constitutes part of the vertebrate skeleton in animals. 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 jonrandallfans.com come in a variety of shapes and sizes and have a complex internal and external jonrandallfans.com: D
This process includes the development of a cartilage model, its growth and development, development of the primary and secondary ossification centers , and the formation of articular cartilage and the epiphyseal plates.
Endochondral ossification begins with points in the cartilage called "primary ossification centers. They are responsible for the formation of the diaphyses of long bones, short bones and certain parts of irregular bones.
Secondary ossification occurs after birth, and forms the epiphyses of long bones and the extremities of irregular and flat bones. The diaphysis and both epiphyses of a long bone are separated by a growing zone of cartilage the epiphyseal plate.
At skeletal maturity 18 to 25 years of age , all of the cartilage is replaced by bone, fusing the diaphysis and both epiphyses together epiphyseal closure.
The epiphyses, carpal bones, coracoid process, medial border of the scapula, and acromion are still cartilaginous. Bones serve a variety of mechanical functions.
Together the bones in the body form the skeleton. They provide a frame to keep the body supported, and an attachment point for skeletal muscles , tendons , ligaments and joints , which function together to generate and transfer forces so that individual body parts or the whole body can be manipulated in three-dimensional space the interaction between bone and muscle is studied in biomechanics.
Bones protect internal organs, such as the skull protecting the brain or the ribs protecting the heart and lungs. While bone is essentially brittle , bone does have a significant degree of elasticity , contributed chiefly by collagen.
Mechanically, bones also have a special role in hearing. The ossicles are three small bones in the middle ear which are involved in sound transduction.
The cancellous part of bones contain bone marrow. Bone marrow produces blood cells in a process called hematopoiesis. These include precursors which eventually give rise to white blood cells , and erythroblasts which give rise to red blood cells.
After the cells are matured, they enter the circulation. As well as creating cells, bone marrow is also one of the major sites where defective or aged red blood cells are destroyed.
Determined by the species, age, and the type of bone, bone cells make up to 15 percent of the bone. Growth factor storage—mineralized bone matrix stores important growth factors such as insulin -like growth factors, transforming growth factor, bone morphogenetic proteins and others.
Bone is constantly being created and replaced in a process known as remodeling. This ongoing turnover of bone is a process of resorption followed by replacement of bone with little change in shape.
This is accomplished through osteoblasts and osteoclasts. Cells are stimulated by a variety of signals , and together referred to as a remodeling unit.
It has been hypothesized that this is a result of bone's piezoelectric properties, which cause bone to generate small electrical potentials under stress.
The action of osteoblasts and osteoclasts are controlled by a number of chemical enzymes that either promote or inhibit the activity of the bone remodeling cells, controlling the rate at which bone is made, destroyed, or changed in shape.
The cells also use paracrine signalling to control the activity of each other. Calcitonin is produced by parafollicular cells in the thyroid gland , and can bind to receptors on osteoclasts to directly inhibit osteoclast activity.
Osteoprotegerin is secreted by osteoblasts and is able to bind RANK-L, inhibiting osteoclast stimulation.
Osteoblasts can also be stimulated to increase bone mass through increased secretion of osteoid and by inhibiting the ability of osteoclasts to break down osseous tissue.
These hormones also promote increased secretion of osteoprotegerin. Vitamin D , parathyroid hormone and stimulation from osteocytes induce osteoblasts to increase secretion of RANK- ligand and interleukin 6 , which cytokines then stimulate increased reabsorption of bone by osteoclasts.
These same compounds also increase secretion of macrophage colony-stimulating factor by osteoblasts, which promotes the differentiation of progenitor cells into osteoclasts, and decrease secretion of osteoprotegerin.
Bone volume is determined by the rates of bone formation and bone resorption. Recent research has suggested that certain growth factors may work to locally alter bone formation by increasing osteoblast activity.
Numerous bone-derived growth factors have been isolated and classified via bone cultures. These factors include insulin-like growth factors I and II, transforming growth factor-beta, fibroblast growth factor, platelet-derived growth factor, and bone morphogenetic proteins.
The release of these growth factors from the bone matrix could cause the proliferation of osteoblast precursors. Essentially, bone growth factors may act as potential determinants of local bone formation.
A number of diseases can affect bone, including arthritis, fractures, infections, osteoporosis and tumours. Conditions relating to bone can be managed by a variety of doctors, including rheumatologists for joints, and orthopedic surgeons, who may conduct surgery to fix broken bones.
Other doctors, such as rehabilitation specialists may be involved in recovery, radiologists in interpreting the findings on imaging, and pathologists in investigating the cause of the disease, and family doctors may play a role in preventing complications of bone disease such as osteoporosis.
When a doctor sees a patient, a history and exam will be taken. Bones are then often imaged, called radiography. This might include ultrasound X-ray , CT scan , MRI scan and other imaging such as a Bone scan , which may be used to investigate cancer.
In normal bone, fractures occur when there is significant force applied, or repetitive trauma over a long time. Fractures can also occur when a bone is weakened, such as with osteoporosis, or when there is a structural problem, such as when the bone remodels excessively such as Paget's disease or is the site of the growth of cancer.
Not all fractures are painful. Compound fractures involve the bone's penetration through the skin. Some complex fractures can be treated by the use of bone grafting procedures that replace missing bone portions.
A common long bone fracture in children is a Salter—Harris fracture. This is to promote bone healing.
In addition, surgical measures such as internal fixation may be used. Because of the immobilisation, people with fractures are often advised to undergo rehabilitation.
There are several types of tumour that can affect bone; examples of benign bone tumours include osteoma , osteoid osteoma , osteochondroma , osteoblastoma , enchondroma , giant cell tumour of bone , and aneurysmal bone cyst.
Cancer can arise in bone tissue, and bones are also a common site for other cancers to spread metastasise to.
Cancers of the bone marrow inside the bone can also affect bone tissue, examples including leukemia and multiple myeloma.
Bone may also be affected by cancers in other parts of the body. Cancers in other parts of the body may release parathyroid hormone or parathyroid hormone-related peptide.
This increases bone reabsorption, and can lead to bone fractures. Bone tissue that is destroyed or altered as a result of cancers is distorted, weakened, and more prone to fracture.
This may lead to compression of the spinal cord , destruction of the marrow resulting in bruising , bleeding and immunosuppression , and is one cause of bone pain.
If the cancer is metastatic, then there might be other symptoms depending on the site of the original cancer. Some bone cancers can also be felt.
Cancers of the bone are managed according to their type, their stage , prognosis, and what symptoms they cause. Many primary cancers of bone are treated with radiotherapy.
Cancers of bone marrow may be treated with chemotherapy , and other forms of targeted therapy such as immunotherapy may be used.
Osteoporosis is a disease of bone where there is reduced bone mineral density , increasing the likelihood of fractures. This density is measured using dual energy X-ray absorptiometry DEXA , with the term "established osteoporosis" including the presence of a fragility fracture.
Osteoporosis treatment includes advice to stop smoking, decrease alcohol consumption, exercise regularly, and have a healthy diet. Calcium and trace mineral supplements may also be advised, as may Vitamin D.
When medication is used, it may include bisphosphonates , Strontium ranelate , and hormone replacement therapy.
Osteopathic medicine is a school of medical thought originally developed based on the idea of the link between the musculoskeletal system and overall health, but now very similar to mainstream medicine.
As of [update] , over 77, physicians in the United States are trained in osteopathic medical schools. The study of bones and teeth is referred to as osteology.
It is frequently used in anthropology , archeology and forensic science for a variety of tasks.
This can include determining the nutritional, health, age or injury status of the individual the bones were taken from. Preparing fleshed bones for these types of studies can involve the process of maceration.
Typically anthropologists and archeologists study bone tools made by Homo sapiens and Homo neanderthalensis. Bones can serve a number of uses such as projectile points or artistic pigments, and can also be made from external bones such as antlers.
Bird skeletons are very lightweight. Their bones are smaller and thinner, to aid flight. Among mammals, bats come closest to birds in terms of bone density, suggesting that small dense bones are a flight adaptation.
Many bird bones have little marrow due to their being hollow. A bird's beak is primarily made of bone as projections of the mandibles which are covered in keratin.
A deer 's antlers are composed of bone which is an unusual example of bone being outside the skin of the animal once the velvet is shed.
The extinct predatory fish Dunkleosteus had sharp edges of hard exposed bone along its jaws. Many animals possess an exoskeleton that is not made of bone.
These include insects and crustaceans. Many animals, particularly herbivores , practice osteophagy —the eating of bones.
This is presumably carried out in order to replenish lacking phosphate. Many bone diseases that affect humans also affect other vertebrates—an example of one disorder is skeletal fluorosis.
Bones from slaughtered animals have a number of uses. In prehistoric times , they have been used for making bone tools.
A special genre is scrimshaw. Bone glue can be made by prolonged boiling of ground or cracked bones, followed by filtering and evaporation to thicken the resulting fluid.
Historically once important, bone glue and other animal glues today have only a few specialized uses, such as in antiques restoration.
Essentially the same process, with further refinement, thickening and drying, is used to make gelatin.
Broth is made by simmering several ingredients for a long time, traditionally including bones. Bone char , a porous, black, granular material primarily used for filtration and also as a black pigment , is produced by charring mammal bones.
Oracle bone script was a writing system used in Ancient China based on inscriptions in bones. Its name originates from oracle bones, which were mainly ox clavicle.
The Ancient Chinese mainly in the Shang dynasty , would write their questions on the oracle bone , and burn the bone, and where the bone cracked would be the answer for the questions.
To point the bone at someone is considered bad luck in some cultures, such as Australian aborigines , such as by the Kurdaitcha.
The wishbones of fowl have been used for divination , and are still customarily used in a tradition to determine which one of two people pulling on either prong of the bone may make a wish.
Various cultures throughout history have adopted the custom of shaping an infant's head by the practice of artificial cranial deformation.
A widely practised custom in China was that of foot binding to limit the normal growth of the foot. From Wikipedia, the free encyclopedia.
Rigid organs that constitute part of the endoskeleton of vertebrates. For other uses, see Bone disambiguation or Bones disambiguation ; note that this article uses anatomical terminology.
A bone dating from the Pleistocene Ice Age of an extinct species of elephant. Main article: Extracellular matrix.
Main article: Anatomical terms of bone. See also: Skeleton , Human skeleton , and List of bones of the human skeleton. Main article: Bone remodeling.
See also: Bone disease. Main article: Bone fracture. Main article: Bone tumour. Main article: Bone metastases. Main article: Osteoporosis.
Main article: Osteopathic medicine in the United States. Main articles: Bird anatomy and Exoskeleton. Gentry; Claud A. Bramblett The Anatomy and Biology of the Human Skeleton.
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American Osteopathic Organisation. Archived from the original PDF on 16 June Retrieved 26 November Rolf; Alfred Enderle Although ancestors of the cyclostomes and elasmobranchs had armoured headcases, which served largely a protective function and appear to have been true bone, modern cyclostomes have only an endoskeleton, or inner skeleton , of noncalcified cartilage and elasmobranchs a skeleton of calcified cartilage.
Although a rigid endoskeleton performs obvious body supportive functions for land-living vertebrates, it is doubtful that bone offered any such mechanical advantage to the teleost bony fish in which it first appeared, for in a supporting aquatic environment great structural rigidity is not essential for maintaining body configuration.
The sharks and rays are superb examples of mechanical engineering efficiency , and their perseverance from the Devonian Period attests to the suitability of their nonbony endoskeleton.
In modern vertebrates, true bone is found only in animals capable of controlling the osmotic and ionic composition of their internal fluid environment.
Marine invertebrates exhibit interstitial fluid compositions essentially the same as that of the surrounding seawater.
Early signs of regulability are seen in cyclostomes and elasmobranchs, but only at or above the level of true bone fishes does the composition of the internal body fluids become constant.
The mechanisms involved in this regulation are numerous and complex and include both the kidney and the gills. Fresh and marine waters provide abundant calcium but only traces of phosphate; because relatively high levels of phosphate are characteristic of the body fluids of higher vertebrates, it seems likely that a large, readily available internal phosphate reservoir would confer significant independence of external environment on bony vertebrates.
With the emergence of terrestrial forms, the availability of calcium regulation became equally significant.
Along with the kidney and the various component glands of the endocrine system , bone has contributed to development of internal fluid homeostasis —the maintenance of a constant chemical composition.
This was a necessary step for the emergence of terrestrial vertebrates. Furthermore, out of the buoyancy of water, structural rigidity of bone afforded mechanical advantages that are the most obvious features of the modern vertebrate skeleton.
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