We think our bodies shut down for the night when we fall asleep. But sometimes theyâre still going â kicking, gasping, even making us wet the bed. These abnormal behaviors are called parasomnias, disorders involving involuntary physical activity that happens during sleep.
lacrimal apparatus a group of organs concerned with the production and drainage of tears; it is a protective device that helps keep the eye moist and free of dust and other
Consists of the lacrimal gland, lacrimal ducts, and the nasolacrimal duct. ophthalmology. Branch of medicine specializing in condition of the eye. optic nerve. The second cranial nerve that carries impulses from the retinas to the brain.