Which cells in the retina are capable of producing an action potential?
What was the term used to justify the expansion of the United States in the 19th century?
What is the path of blood flow through the human heart, starting with the R atrium? (Be sure to include valves and major vessels.)
The flow of blood through the heart begins in the Right atrium. Blood enters the Right atrium from the body via the Superior and Inferior Vena Cavae. The Blood then passes through the Triscipid valve into the Right Ventricle. The blood is then pumped through the Pulmonary Semilunar valve to the lungs. Blood returns to the heart from the lungs via the Pulmonary Veins and enters the Left Atrium. The blood then passes through the Bicuspid valve (mitral valve) into the Left Ventricle. The Left Ventricle pumps blood through the Aortic Semilunar valve into the Aorta and out the body.