The musculoskeletal system is the combination of the muscular and skeletal systems working together and includes the bones, muscles, tendons and ligaments of the body.he musculoskeletal system is the combination of the muscular and skeletal systems working together and includes the bones, muscles, tendons and ligaments of the body.
A social identity is the portion of an individual's self-concept derived from perceived membership in a relevant social group.s originally formulated by Henri Tajfel and John Turner in the 1970s and the 1980s, social identity theory introduced the concept of a social identity as a way in which to explain intergroup behaviour.
Sociology. the belief in the inherent superiority of one's own ethnic group or culture. 2. a tendency to view alien groups or cultures from the perspective of one's own. What pride and self-confidence are to the individual, ethnocentrism, patriotism, local loyalty are to social unities. ethnocentrism.