<prompt> Submental lymph nodes drains from ?Centre of lower lipsPosterior 13 of tongueAnterior 23 of tongueAngle of mouth  <response>: Submental lymph nodesThese lymph nodes lie on the mylohyoid in the submental triangle. The receive afferents from superficial tissue below chin, central pa of lower lip, adjoining gums, anterior pa of the floor of the mouth and tip of the tongue. These nodes, themselves, drain into efferent into submandibular nodes. 