. The eclectic guide to health; or, Physiology and hygiene ... of the figure, the artery is representedas cut open, to show the absence of Capillaries.—The minute, hair-liketubes, into which the arteries finally divide,are called capillaries. See Fig. 36. Theyare so extremely small that they are visibleonly by the aid of the microscope. Theyof an inch in diameter. The skin, except-ing the cuticle, is so full of these tiny vessels, that thepoint of a needle can not enter it without breaking someof them so that the blood flows out. The other membranesof the body are full of them inlik
. The eclectic guide to health; or, Physiology and hygiene ... of the figure, the artery is representedas cut open, to show the absence of Capillaries.—The minute, hair-liketubes, into which the arteries finally divide,are called capillaries. See Fig. 36. Theyare so extremely small that they are visibleonly by the aid of the microscope. Theyof an inch in diameter. The skin, except-ing the cuticle, is so full of these tiny vessels, that thepoint of a needle can not enter it without breaking someof them so that the blood flows out. The other membranesof the body are full of them inlike manner. The walls of thecapillaries are extremely thin—so very thin that the serum ofthe blood readily flows directlythrough these coats and bathesthe various tissues in which thecapillaries lie. It is in this waythat the nourishment of the bloodcomes in contact with the por-tions that need it. The cor-puscles do not pass through thecoats of the capillaries, but are carried along within thecapillaries. Fig- 35- A Portion of anArtery. are about W. 3000. Fig. 36. Capillaries.—1. Vein. 2. Artery, 3. Capillary. CIRCULATION.
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Keywords: ., bookcentury1800, booksubjecthygiene, booksubjectphysiology, booky
