The Physiological Anatomy and Physiology of Man

The Physiological Anatomy and Physiology of Man

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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. 1866 edition. Excerpt: ...in ordinary mildew. At -. a bud is formed by the passage of some of the germinal matter through pore? in the very thick layer of formed materiah X 1300. p. 73. L. S. J3-'Harrisons' Impt. To face p. 76. f 'THE HEW YORK PUBLIC LIBRAE ASTOR. LENOX OF THE SIMPLE CELL. 77 textures which exhibit such remarkable varieties of structure and arrangement, result. Of the structure and formation of the simple Cell.--The low microscopic fungus which is known as common mildew is one of the simplest living things we are acquainted with, and well adapted for study. Some of the smallest particles of mildew capable of independent existence are represented in Plate I. figs 15 and 16, magnified 1800 diameters. The earliest condition of such a particle is shown in fig. 15. If the external membranous investment of a fully developed spore, or of any of the growing branches (figs. 16, 17, 18, 19) was ruptured, such minute particles would be set free in vast numbers and they constitute the living, growing matter, which may be coloured with carmine, while the envelope, or outer part of the cells, does not become coloured. The surface of such a minute living particle becomes altered the instant it comes into contact with air or water. A thin layer upon the outer part of the particle is changed into a soft, passive, transparent, homogeneous substance, exhibiting a membranous character (cell wall), and this henceforth protects the matter within, and at the same time, being permeable to fluids, nutrient matter passes through it into the interior and undergoes conversion into living matter, which thus increases. The entire mass becomes larger. But this increase in size, it must be distinctly observed, is due not to the addition of new matter upon the external surface, but...show more

Product details

  • Paperback | 64 pages
  • 189 x 246 x 3mm | 132g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236491769
  • 9781236491763