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.
The dominant culture in a society is the group whose members are in the majority or who wield more power than other groups. In the United States, the dominant culture is that of white, middle-class, Protestant people of northern European descent.