Quain's Elements of Anatomy, Vol. 1 of 3 (Classic Reprint)

It is divided into departments according to its subjects ;such asH uman A natomy; Comparative A natomy, or the study of the structure of different animals ;and Vegetable A natomy, comprehending the structure of plants. On examining the structure of an organized body, we find that it is made up of members or organs, by means of which its functions are executed, such as the root stem and leaves of a plant, and the heart, brain, stomach and limbs of an animal ;and farther, that these organs are themselves made up of certain constituent materials named tissues or textures, such as the cellular, woody, and vascular tissues of the vegetable, or the osseous, muscular, connective, vascular, nervous, and other tissues, which form the animal organs. Most of the tissues occur in more than one organ, and some of them indeed, as the connective and vascular, in nearly all, so that a multitude of organs, and these greatly diversified, are constructed out of a small number of constituent tissues ;and parts of the body, differing widely in form, construction, and uses, may agree in the nature of their component materials. A gain, as the same tissue possesses the same essential characters in whatever organ or region it is found, it is obvious that the structure and properties of each tissue may be made the subject of investigation apart from the organs into whose formation it enters. The foregoing considerations have led to the subdivision of anatomy into two branches, the one of which, under the name General A natomy, or Histology, treats of the minute structure of the component tissues of the body ;the other, named Special or Descriptive A natomy, treats of its several organs, members, and regions, describing the outward form and internal structure of the parts, their relative situation and mutual connection, and the successive conditions which they present in the progress
(Typographical errors above are due to OCR software and don't occur in the book.)