Final answer:
Lacrimal ducts drain tears from the eye into the nasolacrimal canal, which opens into the nasal cavity and then the nasal pharynx, but not into the middle ear. The maxillary sinus does not directly drain lacrimal fluid.
Step-by-step explanation:
The lacrimal ducts are part of the human body's tear drainage system. The lacrimal fluid, commonly known as tears, is produced by the lacrimal gland located above the eyes. These tears maintain the moist surface of the eye and drain at the medial corner into the nasolacrimal canal. This canal then opens into the nasal cavity, specifically behind the inferior nasal concha. It is here that tears normally find their way into the nasal pharynx, which is a part of the upper throat that connects to the posterior nasal cavity.
In contrast, the middle ear is connected to the nasopharynx via the Eustachian tube, but lacrimal ducts do not drain into the middle ear. Therefore, lacrimal ducts drain into the nasal pharynx, not the middle ear. As for the maxillary sinus, it is an air-filled space within the cheekbones, part of the paranasal sinuses, and also communicates with the nasal cavity but is not directly involved in the drainage of tears.