105. Name the organs of the circulation. Does the blood permeate all parts of the body? What is the average amount in each person? Its composition? The plasma? The red corpuscles? The white? 106. What is the size of a red cell? Are the shape and size uniform? Value of this? Illustrate. Are the disks permanent? What substances are contained in the plasma? What is fibrin? 107. In what sense is the blood "liquid flesh"? What is the use of the red disks? What is the office of the oxygen in the body? Where is the blood purified? 108. What is transfusion? Is it of value? 109. Give some illustrations. What is the cause of coagulation of the blood? Value of this property? Has the fibrin any other use? 110. What organ propels the blood? What is the location of the heart? How large is it? Put your hand over it. What is the pericardium? Describe the systole. 111. The diastole. How many chambers in the heart? What is their average size? What is meant by the right and left heart? What are the auricles? Why so called? The ventricles? 112. What is the use of the auricles? The ventricles? Which are made the stronger? Show the need of valves in the ventricles. Why are there no valves in the auricles? Draw on the board the form of the valves. Name them. 113. Describe the tricuspid valve. The bicuspid. How are these valves strengthened? 114. What peculiarity in the attachment of these cords? Describe the semilunar valves. What are the arteries? Why so named? What is their use? Their structure? How does their elasticity act? What is meant by a "collateral circulation"? 115. How are the arteries protected? Where are they located? Give a general description of the arterial system. What is the aorta? What is the pulse? On which arteries can we best feel it? What is the average number of beats per minute? How and why does this vary? 116. Why does a physician feel a patient's pulse? What are the veins? What blood do they carry? Describe the venous system. What vein does not lead toward the heart? Describe the valves of the veins. What valves of the heart do they resemble? What are varicose veins? 117. Where and how can we see the operation of these valves? What are the capillaries? What is the function of the capillaries? [Footnote: The distinctive function of the capillaries is to offer peripheral resistance to the circulation of the blood. This insures "blood pressure," a condition indispensable to the "heart beat," and also causes leakage (transudation). This leakage brings the nutriment in contact with the tissue cells, whereby they are renewed. In the same way the air passes from the blood to the cells.] What changes take place in this system? 118. Describe the circulation of the blood as seen in the web of a frog's foot.