Human physiology : prepared with special reference to students of medicine / by Joseph Howard Raymond.

  • Raymond, Joseph H. (Joseph Howard), 1845-1915
Date:
1901
Catalogue details

Licence: Public Domain Mark

Credit: Human physiology : prepared with special reference to students of medicine / by Joseph Howard Raymond. Source: Wellcome Collection.

Provider: This material has been provided by the Augustus C. Long Health Sciences Library at Columbia University and Columbia University Libraries/Information Services, through the Medical Heritage Library. The original may be consulted at the the Augustus C. Long Health Sciences Library at Columbia University and Columbia University.

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    epithelium is seen in the (jobkt-ccU. This occurs in the intestine, for example ; the mucin, which is the product of the cell, distends the upper part of it, and the cell bursts (Fig. 22). The mucin is discharged as mucus, and the open, cup-like end of the cell gives to it the peculiar appearance characteristic of the goblet-cell. Goblet-cell. -Cilia. Fig. 21.—Cross-section of stratified ciliated columnar epithelium from the trachea of a rabbit (Huber). Formerly regarded as a simple modification of the columnar cell, these goblet-cells are probably more properly to be considered as a special kind of epithelium which is of a permanent nature, and whose function is to secrete mucus; hence they are sometimes called mucus-secretliK/ ccUs. Spheroidal or Glandular Epithelium.—This is charac- terized by its polyhedral or spheroidal shape, and occurs in secreting Cilia. Mucin. Nucleus Basal process - Fig. 22.—Goblct-cclls from the bronchus of a dog: the middle cell still pos- sesses its cilia: that to the right has already emptied its mucous contents (collapsed goblet-cell); X 600 (Bohm and Davidoff). glands; as, the .salivary glands, liver, and pancreas. The secretion of these glands is the ]>roduct of the protoplasm of the glandular epitlielium. Ciliated Epithelium (Fig. 23).—The characteristic of this variety is the cilia or hair-like or eyelash-like appendages attached