Final answer:
The lacrimal apparatus consists of the lacrimal gland, lacrimal puncta and ducts, and lacrimal sac. The lacrimal gland produces tears, while the lacrimal puncta and ducts collect and transport tears to the lacrimal sac, which serves as a reservoir. Tears then flow from the lacrimal sac into the nose, and with increased tear flow, they may cause a runny nose.
Step-by-step explanation:
The lacrimal apparatus is responsible for producing and draining tears to keep the eye moist. It is composed of two different parts: the lacrimal gland, which secretes tears, and the lacrimal puncta and ducts, which collect and transport tears to the lacrimal sac and then into the nose. The lacrimal gland is located above the eye and produces tears to keep the eye moist. The lacrimal puncta are small openings on the inside edges of the upper and lower eyelids that collect tears. These tears are then transported through lacrimal ducts to the lacrimal sac, which serves as a reservoir for tears. From the lacrimal sac, tears flow into the nasal cavity and may cause a runny nose.