part of part of in taxon develops from develops from contributes to morphology of Serpentes lacrimal apparatus lacrimal gland http://upload.wikimedia.org/wikipedia/commons/c/cf/Gray896.png https://github.com/obophenotype/uberon/wiki/Modeling-paired-structures-Design-Pattern SCTID:181147003 tear gland CALOHA:TS-0512 lacrimal-preorbital gland Wikipedia:Lacrimal_gland VHOG:0001476 FMA:59101 Innervation is highly complex and species-specific UBERON:0001817 The preorbital gland is a paired exocrine gland found in many species of hoofed animals, which is homologous to the lacrimal gland found in humans. These glands are trenchlike slits of dark blue to black, nearly bare skin extending from the medial canthus of each eye. They are lined by a combination of sebaceous and sudoriferous glands, and they produce secretions which contain pheromones and other semiochemical compounds. Ungulates frequently deposit these secretions on twigs and grass as a means of communication with other animals. The preorbital gland serves different roles in different species. Pheromone-containing secretions from the preorbital gland may serve to establish an animal's dominance (especially in preparation for breeding), mark its territory, or simply to produce a pleasurable sensation to the animal. Because of its critical role in scent marking, the preorbital gland is usually considered as a type of scent gland. A further function of these glands may be to produce antimicrobial compounds against skin pathogens. Antimicrobial compounds found in these glands may be biosynthesized by the animal itself, or by microorganisms that live in these glands[Wikipedia:Preorbital_gland]. Wikipedia:Preorbital_gland BTO:0000044 glandula praeorbitalis EFO:0001389 MA:0001296 Lobular organ the parenchyma of which consists of glandular acini which communicate the lacrimal sac. Examples: There only two instances, right lacrimal and left lacrimal glands. EMAPA:35463 UMLS:C0022907 glandula lacrimalis EV:0100339 The lacrimal glands are paired almond-shaped glands, located in or near the orbital region, that secrete the aqueous layer of the tear film.[WP]. In humans, they are situated in the upper, outer portion of each orbit preorbital gland NCIT:C12346 exocrine system exocrine gland gland Harderian gland eye gland lateral gland of orbital region lacrimal gland bud