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  • Title: Ultrastructure of the salivary bladder of the nine-banded armadillo.
    Author: Ruby JR, Allen ER.
    Journal: Cell Tissue Res; 1976 Jun 28; 169(3):383-94. PubMed ID: 949730.
    Abstract:
    The nine-banded armadillo possesses a salivary bladder which is a dilated portion of the main duct of the submandibular gland at its origin. The wall of the bladder is composed of an epithelium, a submucosa and a thick coat of skeletal muscle. The ultrastructure of the epithelium reveals that it is complex and consists of three cell types: 1) principal cells, 2) light cells, and 3) basal cells. The general organization of the epithelium suggests that it is a transporting type of epithelium such as that found in the amphibian and reptilian and reptilian urinary bladders and the mammalian gall bladder. The submucosa is composed primarily of densely-packed collagen fibers. The skeletal muscle is very vascular and richly innervated.
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