| Ducts/ canal | Of which part |
| 1. Anal canal | In mammalian rectum |
| 2. Aqueduct of Sylvius (iter) | Between II & IV brain ventricles |
| 3. Auditory duct or Eustachian/ Pharyngo-tympanic tube | Joins pharynx with middle ear. |
| 4. Bartholin’s duct | Of the sublingual gland |
| 5. Bidder’s canal | Connection of testes to kidneys in frog |
| 6. Bile duct | Duct from gall bladder to duodenum in vertebrates |
| 7. Canal of Schlemm | Drains extra aqueous humour from anterior eye chamber to maintain intraocular pressure. Blockade of canal causes glaucoma |
| 8. Cerebrospinal canal | In the spinal cord of vertebrates |
| 9. Cervical canal | In the vagina of mammal |
| 10. Cochlear canal | In internal ear of mammal modified for hearing |
| 11. Collecting duct | In mammalian kidney to collect urine |
| 12. Cystic duct | Bile duct connecting liver with gall bladder |
| 13. Duct of Bellini (Papillary duct) | In mammalian kidney that opens on tip of renal papillae. Collecting ducts receiving collecting tubules of nephrons |
| 14. Ductus choledochus | The bile duct |
| 15. Ductus endolymphaticus | From membrane, labyrinth to endolymphatic sac |
| 16. Endolymphatic duct | Starting from vestibule (Sacculus) of internal ear dilated to form endolymphatic sac to store endolymph |
| 17. Eustachian tube | Refer auditory duct |
| 18. Haversian canals | In the long bones of mammals for nutrition, excretion and respiration. |
| 19. Hepatic duct | Originates from hepatocytes in liver and unites with cystic duct from gall bladder |
| 20. Hepato-panceatic duct | Common duct that conducts juices from pancreas and liver to duodenum |
| 21. Hyaloids canal | In mammalian eye enveloping vitreous humor |
| 22. Inguinal canal | In groin region to connect abdominal cavity with scrotal sac |
| 23. Lachrymal duct | Of tear glands opening at the medial border of the eye; lachrymal glands beneath the upper eyelid |
| 24. Lactiferous duct | Carrying milk from mammary glands to nipple or teats |
| 25. Laurer’s canal | In trematodes, a canal leading away from the junction of the oviduct and the Vitelline duct opening externally or in alimentary canal |
| 26. Lymphatic duct (right) | Longest lymphatic duct running in thoracic cavity of man |
| 27. Mandibular canal | In lower jaw of mammals |
| 28. Mullerian duct | As oviduct |
| 29. Nasolachrymal canal | Connection between inferior nasal meatus and lachrymal sac |
| 30. Neurenieric canal | A temporary passage connecting the cavity of the nerve cord and the archaenteron in the early embryonic stages of few chordates |
| 31. Neurenteric canal | Connection between neural tube and archenteron in frog embryo. |
| 32. Pancreatic duct | Refer Wirsung duct |
| 33. Papillary duct | Refer duct of Bellini |
| 34. Parotid duct (Stenson’s duct) | Opening of salivary parotid gland near upper molar |
| 35. Pharyngo-tympanic tube | Refer auditory duct |
| 36. Poison canal | Between poison gland and fang of a poisonous snake |
| 37. Rivinus Duct | Duct of sublingual gland opening near tip of tongue |
| 38. Schlemm’s canal | A channel in the eye, at the junction of the cornea and the sclera, through which the aqueous humor drains. |
| 39. Semicircular ducts | In internal ear to balance the body in relation to gravity during circular motion |
| 40. Stenson’s duct | Refer Parotid duct |
| 41. Submaxillary duct (Wharton’s duct) | Opening of submaxillary (submandibular) gland near lower molar |
| 42. Thoracic duct | Lymphatic duct in thorax and abdomen of mammals |
| 43. Thyroglossal duct | Duct to open thyroid gland on tongue at sulcus terminalis during embryonic period |
| 44. Vertebrarterial canal | The canal for the vertebral artery between the two heads of the rib and the vertebra in higher vertebrates |
| 45. Volkman’s canal | Horizontal canals interconnecting Haversian canals |
| 46. Wharton’s duct | Refer Submaxillary duct |
| 47. Wirsung duct | Collecting pancreatic juice from pancreas |
| 48. Wolffian duct | The mesonephric duct; in male amniota as the vas deferens |
