All sea anemones produce venoms delivered through discharging nematocysts and mucous secretions. These are irritating to mucous membranes and respiratory tract. Chronic form of dryness of the mucous membranes. Serous fluid may also originate from mixed glands, which contain both mucous and serous cells. Ethyl acetate is an irritant of the conjunctiva and mucous membrane of the respiratory tract. Bluetongue disease is an insect-borne illness causing fever and inflammation of the mucous membranes. Formamide is moderately irritating to the eyes, skin and mucous membranes. The polyp itself represents an overgrowth of the mucous membranes. It is an irritant to the respiratory tract, skin, eyes, and other mucous membranes. Salivary glands can be classified as serous, mucous or seromucous (mixed). They can also induce dryness of the skin, eyes, and mucous membranes. Niacin and vitamin A are essential nutrients that help maintain mucous membranes. In contact with mucous membranes, hydrolysis produces hydrochloric acid. EBOV is thought to infect humans through contact with mucous membranes or skin breaks. Exposure to these solvents can cause irritation, including to the eyes and mucous membranes.