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 can be something that is tangible and it can also be something that isnât. Culture can become a physical material if it is a product of the beliefs, customs and practices of a certain people with a definite culture.or example, the Egyptian civilization has an Egyptian culture in the same way as the Greek civilization has their Greek culture. A culture ordinarily exists within a civilization. In this regard, each civilization can contain not only one but several cultures.