File:First book on anatomy, physiology, and hygiene - for grammar schools and families (1849) (14763202175).jpg

Identifier: 61410640R.nlm.nih.gov
Title: First book on anatomy, physiology, and hygiene : for grammar schools and families
Year: 1849 (1840s)
Authors: Cutter, Calvin, 1807-1873? Cutter, Calvin, 1807-1873?. First book on anatomy and physiology
Subjects: Hygiene Anatomy Physiological Phenomena
Publisher: Boston : Mussey
Contributing Library: U.S. National Library of Medicine
Digitizing Sponsor: Open Knowledge Commons, U.S. National Library of Medicine

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Fig 40. The aorta and its branches, a, The commencement of the aorta. 193. Describe the aorta. What is represented by fig. 40 ? 6* 66 4.NAT0MT, niYSIOLOGY, AND HYGIENJi. 194. The veins are the vessels which return the hloo-d tothe auricles of the heart, after it has been circulated by thearteries through the lungs and other parts of the body. Atcertain intervals, they are furnished with valves, which allowthe blood to flow toward the heart only. In general, they arenearer the surface of the body than the arteries. 195. The capillaries constitute a microscopic net-work,and are so distributed through every part of the body as to ren-der it impossible to introduce the smallest needle beneath theskin without wounding several of these fine vessels. Theyestablish the communication between the termination of thearteries and the beginning of the veins. 196. The relation of the capillaries to the arteries andveins, is illustrated by figs. 41 and 42. Fig. 41. Fig. 42.
Text Appearing After Image:
■Fig. 41. An ideal view of a portion of the pulmonic circulation. 1, 1, A branchof the artery that carries the impure blood to the lungs. 3, 3, Capillary vessels.2, 2, A vein through which the red blood is returned to the left side of the heart. Fig. 42. An ideal view of a portion of the systemic circulation. 1, 1, A branchof the aorta. This terminates in the capillaries 3, 3. 2, 2, A vein through whichthe impure blood is carried to the right side of the heart. 194. What are veins ? With what are they furnished ? 195. What dothe capillaries constitute? What do they establish ? What does fig 41represent? Fig. 42? & PHYSIOLOGY OF THE CIRCULATORY ORGANS. 67 CHAPTER XIV. PHYSIOLOGY OF THE CIRCULATORY ORGANS. 197. The walls of all the cavities of the heart are composedof muscular fibres, which are endowed with the property of con-tracting and relaxing, like other parts of the muscular system.The contraction and relaxation of the muscular fibres of theheart increase and diminish the s

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