All sea anemones produce venoms delivered through discharging nematocysts and mucous secretions. As well as blood, the fluid consists of cervical mucus, vaginal secretions, and endometrial tissue. Infected birds transmit H5N1 through their saliva, nasal secretions, feces and blood. Influenza can also be transmitted by saliva, nasal secretions, feces and blood. Glandular secretions (usually from their anal glands), urine and feces are used for marking. Females also use bodily secretions and faeces. Carotenoids are eliminated via sweat, sebum, urine, and gastrointestinal secretions. This kin recognition is by olfactory cues from urine, feces and glandular secretions. Lynxes occupy territories marked with special gland secretions, urine, or feces. Gastric secretions and likewise vomit are highly acidic. Over time, thickened secretions called corpora amylacea accumulate in the gland. The virus may also be present in semen and genital secretions. Aerosolized medications that help loosen secretions include dornase alfa and hypertonic saline. Sperm leave the seminiferous tubules in the dilute secretions of Sertoli cells. It may also be spread through direct contact with mouth or nasal secretions.