Syllabus of a course of lectures on physiology delivered at Guy's Hospital.

  • Pye-Smith, Philip Henry.
Date:
1885
Catalogue details

Licence: Public Domain Mark

Credit: Syllabus of a course of lectures on physiology delivered at Guy's Hospital. Source: Wellcome Collection.

Provider: This material has been provided by Royal College of Physicians, London. The original may be consulted at Royal College of Physicians, London.

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    EXCRETION AND SECRETION. Excretion of waste products. Of C as C02, of H as H20, of N as urea, of S, P, &c, as salts. Methods of excretion ; by diffusion of gases, by osmosis of liquids, by true secretion. Secretion a process of cell-growth. Unicellular secreting- glands : goblet-cells. Extension of surface : sacs and pits. Simple saccular depressions—pocketed—more subdivided— racemose—lobulated. Simple deep pits—tubules—branched tubes. Acini and ducts: lobules. Characters of duct-epi- thelium : of secreting epithelium : transitional forms. Base- ment membrane. Connective tissue and lymph - spaces. Capillaries. (Diagram XI.) Regulation by Nervous System. Vaso-motor nerves. Secret- ing nerves to epithelium of acini. (Diagram XII.) Secretion as a mere selection of materials ready formed in the blood : as a manufacture of new compounds from those materials. Process, by transformation of protoplasm of secreting cells ; or by vacuolation— signet-cells. Gradual oozing out of secretion into lumen of acinus; or expulsion by contraction of eel] j or liberation by rupture of cell. Comparison of this com- plete process with storing of secretion, as of starch in roots, and oil in adipose tissue; with ordinary nutrition (every tissue an excretion to every other); with endogenous proliferation. Histological difference between glands at rest and secreting. Serous and mucous glands. Development of glands. i. Glands opening onto skin, ii. Glands opening onto mucous membranes, iii. Genito- urinary glands. D
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