Bone is an organ firm, hard and rugged part of the endoskeleton of Vertebrate. It is Composed Mainly of bone tissue, a type of connective tissue Specialized Composed of cells, and calcified extracellular components. Also you Covered Bone connective tissue (periosteum) and cartilage (articular process), Vessels, Nerves, and Some adipose tissue and hematopoietic Contain (bone marrow).
The bones Have Various forms and serve Several functions. With a complex internal structure but very functional morphology Determines the bones are light but very strong and hard.
The total set and Organized the bone pieces (bones) forms the skeleton or skeletal system. Each piece server to function particularly in relation to September and the next piece to Which is Articulated.
The bones in the human being are so vital Organs Such as muscle or brain, and large capacity for With A regeneration and Reconstitution. Howeve, Commonly There Is a view of the bone as an inert structure, as it is visible Usually the pieces of bone are dry and free of-organic material of the skeletons of corpses After the decomposition.
The general constitution of the bone is the bone tissue. While not all are equal in size bones and consistency, on average, ITS chemical composition is 25% water, 45% of calcium phosphate minerals and Such as carbonate, and 30% organic matter, collagen and other proteins Mainly. THUS, the inorganic components reach Approximately two Thirds (65%) of bone weight (and only 35% is organic).
The minerals in the bones are not inert components or fixed REMAIN But are Constantly Exchange and Replace with the organic components in a process Known as remodeling.
Its formation and maintenance is Regulated by hormones and food intake, Which Provide vital vitamins for proper operation.
Howeve, not all parts of the body type of tissue Have This, like the penis, ears, sinuses and nose.
Consistent Highly resistant material is to shocks and Pressures But Also elastic, Visual Impact Muscle Building vital Protects Organs like the heart, lungs, brain, etc. .. Also allows movement in parts of the body to carry out work or by setting the displacement Activities of the person. Form Causing the locomotive or the bone structure to esqueleto.Es Also calcium and phosphorus storage of in the body.
The bones are living tissue Called Composed of connective tissue.
The bones are classified as:
Long bones .- Have a predominately cylindrical shape width and length on the thickness, are Divided Into three parts to body and two ends (proximal and distal), usually found in the Members locomotive. Example: humerus, femur, metacarpals, etc.Huesos Short .- Have a cuboid shape, That none of ITS Being dominant size, STI function is damping. Examples: carpal bones and Plans tarso.Huesos your main characteristic .- Is That They Are Longer Than WIDER and thick, STI function is to Protect soft tissue and insertion of large muscle mass. Examples: scapula, and skull bones do not show coxal.Huesos Irregular .- predominant form for grouping or division, are odd and are Located in the midline, are variable functions STI But The Most Important is the protection of the CNS system. Examples: vertebrae, occipital, distal phalanx.
Compact bone (cortical) bone is compact or cortical shaft (the elongated Portion of the long bones left in the middle of the epiphysis or distal portions thereof). They Appear as a continuous solid mass is only an structure Whose optical microscope. Its mineralized bone matrix is Deposited on slides Between These lakes are Located in the osteocytes (each lagoon With The osteocyte is Called osteoblasts) from Each radiating canaliculi (canaliculi very thin), and allow the branched Communicate nutrition osteocytes (Remember That this is Because the osteocytes are important Surrounded by mineralized matrix allows the diffusion of That nutrients to the osteocytes). The lamellae are arranged in 3 Ways:
Concentrically around a longitudinal vascular canal (called Haversian canal), Which contains Capillaria, arterioles, venules and postcapillary Sometimes Structures forming cylindrical Haversian systems or osteons Called microscopically visible óptico.Entre angularly arranged the osteons are interstitial systems forming Separated by cement lines of osteons calls (layer of bone matrix collagen Fibers are not crossed by poor These canaliculi, or Who Have nonvascular elements, All That is observable by light microscopy.) Underneath the periosteum on the inner surface and below are endosteum around the circumference Located of the stem of circumferential lamellae extended internal and external form (parallel to the surface). Haversian canals Communicate With Each Other With The marrow cavity surface or the transverse or oblique canals or channels Called Volkman Perforating Vessels That Have Come From the periosteum and endosteum Larger Than the osteons to Communicate With Each Other. At the light microscope is Difficult to Recognize Because They Are Surrounded by concentric lamellae.
