Notes on physiology / by Henry Ashby.

  • Henry Ashby
Date:
1889
Catalogue details

Licence: Public Domain Mark

Credit: Notes on physiology / by Henry Ashby. Source: Wellcome Collection.

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    the nasal cavity (except the olfactory region), the antrum, ethmoidal and frontal sinuses, the nasal and lachrymal ducts, the upper part of the pharynx, the Eustachian tube, tympanic cavity, larynx, except the vocal cords, trachea, and bronchi till they enter the infundibula of the lungs. (b) Lining the mucous membrane of the uterus, commencing at the middle of the cervix and con- tinuing along the Fallopian tubes to their fimbriated extremities. {c) Lining the vasa efferentia, coni vasculosi, and upper part of the globus major of the testis. (d) Lining the lateral ventricles of the brain and central canal of the spinal cord in the child. Many of the animalcula and alg 8e, as the para- mecia, rotifera, vorticella, volvox, are provided with cilia as a means of locomotion, or for producing cur- rents in the water, so as to carry their prey within their reach. Cilia are also found in the gills of the oyster and salt-water mussel, and doubtless serve to bring a fresh supply of oxygenated water in contact with the capillaries of their gills. In man, they probably prevent the accumulation of mucus or foreign particles on the surfaces they line, and possibly in the testicle help forward the immature spermatozoa. They are most readily obtained for the microscope by snipping a small piece from the gills of the mussel, and covering with thin glass ; they will continue to work for hours if evaporation be prevented. PIGMENT, Pigment is met with in various parts of the body, for the most part in epithelium and connective-tissue cells. It is met with in epithelium cells in the external layer of the retina and posterior surface of the iris;
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