In the United States, middle schools and high schools often offer choir as a class or activity for students. Some choirs participate in competitions. One kind of choir popular in high schools is show choir. Middle school and high school is an important time, as it is when students' voices are changing.
Veins and arteries. Vascular disease is a class of diseases of the blood vessels â the arteries and veins of the circulatory system of the body. It is a subgroup of cardiovascular disease. Disorders in this vast network of blood vessels, can cause a range of health problems which can be severe or prove fatal.
1 Although the term peripheral vascular disease can include any disorder that affects any of the blood vessels, it often is used as a synonym for peripheral artery disease. 2  Peripheral vascular disease is the most common disease of the arteries.