Tubular component of the lacrimal drainage system extending from the nasolacrimal sac to the floor of the nose; conducts tears from the eye into the nose.

Duct taking tears from the eye to the nose, narrowing of this duct in Persian and Exotic cats causes tears to run down the face

passageway that carries tears to the nose

a canal that transports the lacrimal secretion (tears) from the nasolacrimal sac into the nose

The nasolacrimal duct carries tears from the lacrimal sac into the nasal cavity. Excess tears flow through nasolacrimal duct which opens in the nose. This is the reason the nose starts to run when a person is crying.