Outlines Of Comparative Anatomy And Medical Zoology by Harrison AllenOutlines Of Comparative Anatomy And Medical Zoology by Harrison Allen

Outlines Of Comparative Anatomy And Medical Zoology

byHarrison Allen

Paperback | February 9, 2012

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated.1869 Excerpt: ... COMPARATIVE ANATOMY. i. INTBODUCTIOHL ELEMENTS OF STRUCTURE. The composition of all bodies is either inorganic or organic. An inorganic (mineral) body is homogeneous in structure, and is either crystalline or without definite form. Its increase results from external accumulation of particles. An organic body is a product of organization. An organized body (organism) is heterogeneous in structure, and has a definite form. Its increase results from nutritive processes carried on within. Every organized body is composed of ultimate and proximate physical elements. The Ultimate Physical Elements are (1) homogeneous liquid,--as in the germinative area of the egg immediately after impregnation; (2) homogeneous granules,--as in Monas crepuscidum; (3) homogeneous filaments,--as in cilia, spermatic filaments, and Vibrio; (4) homogeneous membrane,--as in basement membrane. (Leidy.) The Proximate Physical Elements result through union of the ultimate elements. They are very constantly pronounced in varieties of the organic cell, of which it is convenient to speak, as an early, though not a primordial, expression of form. As usually described, the organic cell is a minute form, composed of homogeneous membrane with intervening I spaces occupied with homogeneous liquid. Three concentric spheres can commonly be detected: the first (nucleolus) placed within the second (nucleus); the third (cell wall) en. closing the other two. Homogeneous granules appear within the liquid, and filaments (cilia) may be appended to the cell wall. Forms Of Cells are round, oblong, elongate, cylindrical, compressed, polygonal, and stellate. Surrounding conditions and position determine shape. Properties Of Cells.--In addition to the nutritive processes common to all organisms, may be mentione...
Title:Outlines Of Comparative Anatomy And Medical ZoologyFormat:PaperbackDimensions:66 pages, 9.69 × 7.44 × 0.14 inPublished:February 9, 2012Publisher:General Books LLCLanguage:English

The following ISBNs are associated with this title:

ISBN - 10:0217246176

ISBN - 13:9780217246170