valve are forced shut while the ventricular outflow valves, the and the valves, are forced open by the ventricular pressure. Blood leaving the ventricles is prevented from flowing backwards by the tight seal formed by the cusps of the and valves. 1. Describe the importance of the heart to the circulatory system. Click or tap here to enter text. 2. Describe the flow of blood from where it begins to where it restarts. Click or tap here to enter text. 3. Describe the anatomy of the external and internal heart and how it functions. Click or tap here to enter text. 4. How does the blood flow through the pulmonary system? Click or tap here to enter text. 5. What are the components of blood? Click or tap here to enter text. 6. Why is blood typing important? Click or tap here to enter text. 7. What are common diseases, disorders, and laboratory tests related to the circulatory system? Click or tap here to enter text. Choose two of the following diseases/disorders affecting the circulatory system. For both, enter the name, description, signs and symptoms, etiology, and treatments. Iron deficiency anemia Angina Arteriosclerosis Atherosclerosis Pericarditis Endocarditis Right-Sided Heart Failure Coronary Artery Disease Hypertrophic Cardiomyopathy B. Click or tap here to enter text. 9. Click or tap here to enter text