Kirkes' handbook of physiology. / By W. Morrant Baker and Vincent Dormer Harris.
- William Senhouse Kirkes
- Date:
- 1888
Licence: Public Domain Mark
Credit: Kirkes' handbook of physiology. / By W. Morrant Baker and Vincent Dormer Harris. 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.
52/912 page 28
![going on during life, the discharged cell-contents contributing to form mucus, the cells being supposed in many cases to recover their original shape. It is an example of secretion. 4. Ciliated cells are generally cylindrical (fig. 23, b), but may be spheroidal or even almost squamous in shape (fig. 23, a). This form of epithelium lines—(a.) the whole of the respiratory tract from the larynx, except over the vocal cords, to the finest sub-divisions of the bronchi, also the loM'er parts of the nasal ]jassages, the nasal duct, and the lacln-ymal sac. In part of this tract, however, the epithelium is in several layers, of which only the most superficial is ciliated, so that it should more accurately rig. 23.—A. Spheroidal cUialed cells from the mouth of the frog. X 300 diameters. . (Shai-pey.). ■ B. a. Ciliated columnar eiiit/ielium lining a bronchus, b. Branched connective-tissue eoipuscles. (Kleia and Noble Smith.) be termed transitional (p. 29) or stratified, (b.), some portions of the generative apparatus in the male, viz., lining the vaaa efferentia of the testicle, and their prolongations as for as the lower end of the epididymis; in the female (c.) commencing about the middle of the neck of the uterus, and extending throughout the uterus and Fallopian tubes to their fimbriated extremities, and even for a short distance on the peritoneal surface of the latter, (d.) The ventricles of the brain and the central canal of the spinal cord are clothed with ciliated epithelium in the child, but in the adult this epithelium is limited to the central canal of the cord. The Cilia, or fine hair-like processes which give the name to this variety of epithelium, vary a good deal in size in different classes of animals, being very nmcli smaller in the higher than among the lower orders, in which they sometimes exceed in length tliecell itself. The number of cilia on any one cell ranges from ten to thirty, and those attached to the same cell are often of different lengths.](https://iiif.wellcomecollection.org/image/b24757226_0052.jp2/full/800%2C/0/default.jpg)
