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.
culture is an integrated, patterned system that if one part changes, the other parts are affected what are core values a set of characteristics that integrate each culture and distinguish it from others