The 11 systems of the body - rectoria.unal.edu.co

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(OLD VIDEO) Human Body Systems: The 11 Champions the 11 systems of the body

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ALS is a motor neuron disease , also spelled "motor neurone disease", which is a group of neurological disorders that selectively affect motor neurons , the cells that control voluntary muscles of the body. This form is called " bulbar -onset ALS". A few people with ALS have symptoms that are limited to one spinal cord region for at least 12 to 24 months before spreading to a second region; these regional variants of ALS are associated with a better prognosis. Typical or "classical" ALS involves upper motor neurons in the brain, and lower motor neurons in the spinal cord. It is more common in males. Examples include flail arm syndrome, flail leg syndrome, and isolated bulbar ALS. Flail arm syndrome and flail leg syndrome are often considered to be regional variants of PMA because they only involve lower motor neurons.

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Astrologia later passed into meaning 'star-divination' with astronomia used for the scientific term. From a 15th-century Welsh manuscript Many cultures have attached importance to astronomical events, and the Indians , Chinese , and Maya developed elaborate systems for predicting terrestrial events from celestial observations. In the West, astrology most often consists of a system of horoscopes purporting to explain aspects of a person's personality and predict future events in their life based on the positions of the sun, moon, and other celestial objects at the time of their birth. The majority of professional astrologers rely on such systems. The text is dated between BCE to final centuries BCE by various scholars according to astronomical and linguistic evidences.

Classification[ edit ] The number of joints depends on if sesamoids are included, age of the human and the definition of joints. However,The human body possesses joints. Structural classification is determined by how the bones connect to each other, while functional classification is determined by the degree of movement between the articulating bones. In practice, there is significant overlap between the two types of classifications. Clinical, numerical classification[ read article ] oligoarticular or pauciarticular — concerning 2—4 joints polyarticular — concerning 5 or more joints Structural classification binding tissue [ edit ] Types of joints based upon their structure L to R : Cartilaginous joint, Fibrous joint, and Synovial joint.

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Structural classification names and divides joints according to the type of binding tissue that connects the bones to each other. There are two types: primary cartilaginous joints composed of hyaline cartilageand secondary cartilaginous joints composed of hyaline cartilage covering the articular surfaces of the involved bones with fibrocartilage connecting them. Most synarthrosis joints are fibrous joints e. According to the anatomic classification, joints are subdivided into simple and systemms, depending on the number of bones involved, and into complex and combination joints: [16] Simple joint: two articulation surfaces e.]

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