part of part of innervated by innervated_by in taxon produces produces Meriones unguiculatus Tetrapoda Caudata Anura Metatheria Chiroptera Primates Homo sapiens Canidae Felidae Perissodactyla Ruminantia camera-type eye exocrine system exocrine gland Harderian gland Hardarian gland SCTID:41474005 glandula palpebra tertia profundus Wikipedia:Harderian_gland In mammals, the gland excretes an oily substance used to preen the fur[WP] The Harderian gland is an anterior orbital gland usually associated with the nictitating membrane, and produces and secretes a variety of substances to the eye, depending upon the species[GO]. The harderian gland may be compound tubular (MacLeod, 1880; Paule, 1957) or compound tubuloacinar/tubuloalveolar (Aureli, 1957; Hoffman, 1971). In mouse the HG appears in the posterior part of eye region, in the form of nonluminated tubules between the sixteenth and eighteenth days of gestation. At birth it is still not differentiated histologically. In birds the HG originates from the conjunctival epithelium at a late embryonic stage. In the English sparrow, Passer domesticus (incubation period of about 13 days), it appears between the seventh and the eighth days of incubation. In the chick embryo (incubation period of about 21 days) it originates between the eleventh and the twelfth days.[PMID:9156609] In the limbless, burrowing amphibian Apoda (Caecilians) the harderian gland is very large, filling much of the orbit and lubricating a retractile sensory tentacle rather than the eye (Walls, 1942; Wolff, 1948). EMAPA:19153 MESH:D006243 BTO:0000557 UMLS:C0018597 Harder's gland MA:0001247 GAID:1219 In some animals it acts as an accessory to the lacrimal gland, secreting fluid that eases movement of the nictitating membrane[WP] UBERON:0004187 The functions attributed to the gland are many and diverse. Amongst these, it has been held to be a site of immune responses, a source of thermoregulatory lipids, a source of pheromones, a photoprotective organ and part of a retinal-pineal axis. It is arguably the last remaining large organ of widespread dis- tribution among the vertebrates to which we cannot confidently ascribe a confirmed function. deep gland of the nictitating membrane gland of Hardarian NCIT:C77619 eye gland medial gland of ocular region inferior branch of oculomotor nerve secretion of Harderian gland