Elementary anatomy and physiology : for colleges, academies, and other schools elementaryanato00hitc Year: 1869 AND PHYSIOLOGY. 17 fluid, with a saltish taste, and having odor, secreted from the perspiratory glands. Elementary Tissues. 58. Simple, or Basement Membrane.—1. Simple Mem- brane. This is usually a structureless layer of coagulated albumen, often not more than 20000th of an inch thick. It forms the walls of all cells, and is also spread out, as an in- ferior layer of the skin and mucous membrane, and is then called basement membrane. It is the most simple of all the tissues, yet it
Elementary anatomy and physiology : for colleges, academies, and other schools elementaryanato00hitc Year: 1869 AND PHYSIOLOGY. 17 fluid, with a saltish taste, and having odor, secreted from the perspiratory glands. Elementary Tissues. 58. Simple, or Basement Membrane.—1. Simple Mem- brane. This is usually a structureless layer of coagulated albumen, often not more than 20000th of an inch thick. It forms the walls of all cells, and is also spread out, as an in- ferior layer of the skin and mucous membrane, and is then called basement membrane. It is the most simple of all the tissues, yet it is the agent of secretion, and sometimes of ab- sorption, and these Professor Peaslee considers as its vital properties, though of a low grade. 59. Imbibition.—Simple membrane also possesses the re- markable property of allowing fluids to pass through it when it is placed between two fluids ; the effect depending in part upon the electro-chemical relations of the substances, but not, as generally supposed, on the difference of specific gravity of the liquids. This is called endosmose and exosmose, or Imbibition, and is the principal means by which fluids are made to pass from one part of the system to another, where no distinct vessels are provided for that purpose. 60. Simple Fiber.—2. Simple Fiber. This consists es- sentially of threads of coagulated fibrine, whose average diameter is about g s'o 0 th of an inch thick. It does not appear to be a permanent constituent of the body, but only a basis for the development of the more complicated tissues. A good example of the simple fiber may be seen in the membrane lining the inside of an egg shell, as in rig. 5. 58. What is simple membrane ? How thick ? Where is it found ? What other nam© is given to it? 59. Describe Imbibition. What purpose does it effect? 60. Describe simple fiber. Its size. Where best seen ?
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