Angina pectoris, commonly known as angina, is the sensation of chest pain, pressure, or squeezing, often due to ischemia of the heart muscle from obstruction or spasm of the coronary arteries.
Pure Culture. A pure culture is a population of cells or multicellular organisms growing in the absence of other species or types.
 High culture  is a term now used in a number of different ways in academic discourse, whose most common meaning is the set of cultural products, mainly in the arts, held in the highest esteem by a culture.rnold saw high culture as a force for moral and political good, and in various forms this view remains widespread, though far from uncontested. The term is contrasted with popular culture or mass culture and also with folk culture, but by no means implies hostility to these.