part_of part of part of develops_from develops from develops from contributes to morphology of camera-type eye external ectoderm anatomical system lacrimal apparatus lacrymal system A network of orbital structures of the eye that secrete and drain tears from the surface of the eyeball into the nasal cavity; these parts include the lacrimal glands, lacrimal lake, lacrimal ducts, lacrimal canals, lacrimal sacs, nasolacrimal ducts, and lacrimal puncta. nasolacrimal drainage system nasolacrimal system lacrimal drainage system apparatus lacrimalis ectoderm-derived structure ocular surface region ocular adnexa