. An analytical compendium of the various branches of medical science, for the use and examination of students. Anatomy; Physiology; Surgery; Obstetrics; Medicine; Materia Medica. 24 PHYSIOLOGY. examination of all these different classifications. That one has been adopted which seems to be most generally received. The elementary membrane was alluded to and described, as far as seemed requisite, in the commencement of this article ; we proceed at once, therefore, to the consideration of the second group of tissues, the fibrous. OF THE SIMPLE FIBROUS TISSUES. Under this head are included two kin
. An analytical compendium of the various branches of medical science, for the use and examination of students. Anatomy; Physiology; Surgery; Obstetrics; Medicine; Materia Medica. 24 PHYSIOLOGY. examination of all these different classifications. That one has been adopted which seems to be most generally received. The elementary membrane was alluded to and described, as far as seemed requisite, in the commencement of this article ; we proceed at once, therefore, to the consideration of the second group of tissues, the fibrous. OF THE SIMPLE FIBROUS TISSUES. Under this head are included two kinds of texturoj resembling each other only in the fact that they present to the eye a fibrous aspect. They differ in their ultimate structure, colour, and pliysic^' properties. They are both used in connexion with the skeleton, and are concerned in the mechanism of animal motion and locomotion. They are known as the white and yelloiv fibrous tissues. It will be remembered that there is reason to doubt whether they are generated by a metamorphosis of cells, or whether they are not produced by the consolidation of a plastic fluid which has been elaborated by cells; the latter is the more probable hypothesis. The white fibrous tissue is found in textures requiring great flexi- bility, strength, and an unyielding firmness; such as ligaments, tendons, fibrous membranes, aponeuroses, &c. It presents itself in the form of inelastic bands, somewhat wavy in their direction, some- times arranged side by side, at others, disposed on different planes, and interlacino; and crossin<j in various directions. (Fig. 3.) It is inelastic, and under ordinary circumstances, inextensibh; con- tains but few vessels, and no nerves, at least they have never been satisfactorily disco- vered. It seems entirely destitute of any vital properties; and its chemical nature is such that it needs very little interstitial change to maintain its normal composition. It yields gelatine in considerable quantity
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