Scleritis (inflammation of sclera) is a strong indication of the underlying medical problem. It can be due to fungal, viral or parasitic infection, trauma, exposure to chemicals, poisonous gases or due to post-surgical complications.
Mast cells are granulated cells typically found in connective tissue. These cells mediate immune responses to foreign particles. In particular, they release large amounts of histamine and enzymes in response to antigen recognition.
Two basic types of acinar epithelial cells exist: Acini in the parotid glands are almost exclusively of the serous type, while those in the sublingual glands are predominantly mucous cells. In the submaxillary glands, it is common to observe acini composed of both serous and mucous epithelial cells. submaxillary (mandibular) glands-produce a mixed serous and mucous secretion. 2  sublingual glands-secrete a saliva that is predominantly mucous in character. 3  serous cells, which secrete a watery fluid, essentially devoid of mucus. 4  mucous cells, which produce a very mucus-rich secretion.