date_of_birth clopton havers
Sharpey ' s fibres ( bone fibres , or perforating fibres ) are a matrix of connective tissue consisting of bundles of strong predominantly type I collagen fibres connecting periosteum to bone . They are part of the outer fibrous layer of periosteum , entering into the outer circumferential and interstitial lamellae of bone tissue . Health is the level of functional and metabolic efficiency of a living organism . In humans it is the ability of individuals or communities to adapt and self - manage when facing physical , mental or social changes . The World Health Organization ( WHO ) defined health in its broader sense in its ___MASK41___ constitution as " a state of complete physical , mental , and social well - being and not merely the absence of disease or infirmity ." This definition has been subject to controversy , in particular as lacking operational value , the ambiguity in developing cohesive health strategies , and because of the problem created by use of the word " complete ". Other definitions have been proposed , among which a recent definition that correlates health and personal satisfaction . Collagen is the main structural protein in the extracellular space in the various connective tissues in animal bodies . As the main component of connective tissue , it is the most abundant protein in mammals , making up from ___MASK22___ % to 35 % of the whole - body protein content . Depending upon the degree of mineralization , collagen tissues may be rigid ( bone ), compliant ( tendon ), or have a gradient from rigid to compliant ( cartilage ). Collagen , in the form of elongated fibrils , is mostly found in fibrous tissues such as tendons , ligaments and skin . It is also abundant in corneas , cartilage , bones , blood vessels , the gut , intervertebral discs and the dentin in teeth . In muscle tissue , it serves as a major component of the endomysium . Collagen constitutes one to two percent of muscle tissue , and accounts for 6 % of the weight of strong , tendinous muscles . The fibroblast is the most common cell that creates collagen . Clopton Havers ( ___MASK59___ ( Stambourne , Essex ) - April 1702 ) was an English physician who did pioneering research on the microstructure of bone . He is believed to have been the first person to observe and almost certainly the first to describe what are now called Haversian canals and Sharpey ' s fibres . Haversian canals ( sometimes canals of Havers , named after British physician Clopton Havers ) are a series of microscopic tubes in the outermost region of bone called cortical bone that allow blood vessels and nerves to travel through them . Each haversian canal generally contains one or two capillaries and nerve fibres . The channels are formed by concentric layers called lamellae . The haversian canals surround blood vessels and nerve cells throughout bones and communicate with bone cells ( contained in spaces within the dense bone matrix called lacunae ) through connections called canaliculi . This unique arrangement is conducive to mineral salt deposits and storage which gives bone tissue its strength . Stambourne is a village and civil parish in the Braintree District in north Essex , England . The population at the 2011 Census was ___MASK61___ . Braintree is a local government district in the English county of Essex , with a population ( 2011 census ) of ___MASK80___ , 084 . Its main town is Braintree . A profession is a vocation founded upon specialized educational training , the purpose of which is to supply disinterested objective counsel and service to others , for a direct and definite compensation , wholly apart from expectation of other business gain . The term is a truncation of the term " liberal profession ", which is , in turn , an Anglicization of the French term " profession libérale ". Originally borrowed by English users in the 19th century , it has been re - borrowed by international users from the late 20th , though the ( upper - middle ) class overtones of the term do not seem to survive retranslation : " liberal professions " are , according to the European Union ' s Directive on Recognition of Professional Qualifications ( ___MASK9___ / 36 / EC ) " those practiced on the basis of relevant professional qualifications in a personal , responsible and professionally independent capacity by those providing intellectual and conceptual services in the interest of the client and the public ". Clopton Havers ( 24 Feb 1657 ( Stambourne , Essex ) - Apr 1702 ) was an English physician who did pioneering research on the microstructure of bone . He is believed to have been the first person to observe and almost certainly the first to describe what are now called Haversian canals and Sharpey ' s fibres . A physician , medical practitioner , medical doctor or simply doctor is a professional who practises medicine , which is concerned with promoting , maintaining , or restoring health through the study , diagnosis , and treatment of disease , injury , and other physical and mental impairments . Physicians may focus their practice on certain disease categories , types of patients and methods of treatment  known as specialities  or they may assume responsibility for the provision of continuing and comprehensive medical care to individuals , families , and communities  known as general practice . Medical practice properly requires both a detailed knowledge of the academic disciplines ( such as anatomy and physiology ) underlying diseases and their treatment  the " science " of medicine  and also a decent competence in its applied practice  the art or " craft " of medicine .