The heart receives its own supply of blood from a network of arteries, called the coronary arteries. Two major coronary arteries branch off from the aorta near the point where the aorta and the left ventricle meet:
Walton, Ernest Thomas Sinton - Student Encyclopedia (Ages 11 and up) (1903-95), Irish physicist. Born in County Waterford, Ireland, Walton, with Sir John D. Cockcroft, received the 1951 Nobel prize in physics for the development of the first nuclear-particle accelerator.
(July 2010) The NelsonâDenny Reading Test was created in 1929 by M.S. Nelson and E.C. Denny, both of whom were on the faculty of Iowa State Teacher's College. The purpose of the test is to measure reading ability among high school and college students.