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mucous cells, which produce a very mucus-rich secretion Acini in the parotid glands are almost exclusively of the serous type, while those in the sublingual glands are predominantly mucus cells. In the submaxillary glands, it is common to observe acini composed of both serous and mucus epithelial cells. In the histologic sections of canine salivary gland shown above, the cells stained pink are serous cells, while the white, foamy cells are mucus-secreting cells. Secretion of saliva is under control of the autonomic nervous system, which controls both the volume and type of saliva secreted.
Overview of Canine Salivary Mucocele. Salivary mucocele is a condition in which saliva leaks from a damaged salivary gland or duct and collects in the surrounding tissues that can occur in dogs. The condition is also known as sialocele, cervical sialocele, cervical mucocele, ranula, and salivary cyst.alivary glands are located under the ears, in the back of the mouth, and under the tongue, and the saliva produced within each gland travels through a small duct to get to the oral cavity. Damage to the gland or the duct can lead to leakage of the saliva into the adjacent tissues and create a mucocele.