. Human and comparative anatomy, physiology, and hygiene . ts of the heart in animals? in reptiles? in fishes? Review nr Torres. — Give the Anatomy of the heart, human and comparative,the Physiology, the Hygiene. (See outline anatomical, Plate VI.) Less on XII. 127. In those cities that receive their supply of waterfrom a reservoir, care is taken that every family mayhave its needful quantity. Thus in the human body,every organ receives its due supply of blood ; and thedistribution of the lifegiving fluid is called the systemiccirculation. (Figs. 39, 40, 41, 42.) Q. What is the distribution of
. Human and comparative anatomy, physiology, and hygiene . ts of the heart in animals? in reptiles? in fishes? Review nr Torres. — Give the Anatomy of the heart, human and comparative,the Physiology, the Hygiene. (See outline anatomical, Plate VI.) Less on XII. 127. In those cities that receive their supply of waterfrom a reservoir, care is taken that every family mayhave its needful quantity. Thus in the human body,every organ receives its due supply of blood ; and thedistribution of the lifegiving fluid is called the systemiccirculation. (Figs. 39, 40, 41, 42.) Q. What is the distribution of blood throughout the bodycalled I SYSTEMIC CIRCULATION* 128. The systemic circulation consists of the a-ortaand branches, vena cava and branches, capillaries, # Illustrate this lesson by using the heart and blood vessels of domes-tic animals, outline diagrams, and blackboard. 54 ANATOMY, PHYSIOLOGY, AND HYGIENE. vena poria, lactc-als, and ah-sorbenis. (Figs. 39, 40, 41, 42.) Q. Name the vessels which comprise the systemic circulation Fig. 39. Fig. Fig. 39. 1. Left ventricle of the heart. 2, 3. Aorta. 5, 5. Arteriesthat extend to the lower extremities. 6, 6. Arteries of the neck. 7, 7. Ar-teries of the arms. Fig. 40. 1. Right auricle of the heart. 2, 3. Large veins that openinto the right auricle. 4, 4. Veins of the lower extremities. 5, 5. Vein9of the arms. 6. Veins of the neck. The arrows 8how the direction thatthe blood flows. SYSTEMIC CIRCULATION. 55 129. The aorta, or large artery, arises from the leftventricle of the heart, and its branches extend to everypart of the body. Through these vessels the purifiedblood flows to the systemic capillaries. (Fig. 39.) Q. Through what vessels does the blood flow to every part otthe body 1 130. At the commencement of the aorta are threevalves, called sem-i-lunar These prevent the bloodreturning to the heart. (Fig. 39.) Q. Where are the semilunar valves, and what is their use 1 131. The systemic veins commence in the capillaries
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