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.
Vascular disease is an abnormal condition of the blood vessels. Blood vessels (arteries and veins) are the tubes that pump blood throughout the body. Arteries carry oxygen-rich blood from the heart to nourish every part of the body, including the brain, kidneys, intestines, arms, legs and heart itself. Veins carry the blood back to the heart. Problems along this vast network of blood vessels, called the vascular system, can cause severe disability and death. To assist you in understanding the highway that is your vascular system, we have created an interactive map for your use in navigating the vessels that carry your blood.