11. The Central Canal Towpath of Indianapolis follows along a portion of the completed eight miles ( 13 km ). 12. From its central canal , a gentle flow skimmed a series of steps before pooling in a shimmering, lily-filled basin. 13. This central region surrounds the central canal , which is an extension of the fourth ventricle and contains cerebrospinal fluid. 14. The "'Indiana Central Canal "'was a canal intended to connect the Wabash and Erie Canal to the Ohio River. 15. The fourth ventricle narrows at a region called the obex to become the central canal of the spinal cord. 16. In Indianapolis the Monon connects with the Central Canal Towpath along the Indiana Central Canal, and the Fall Creek Trail. 17. Galen continued the notion of a central canal , but he dissected the optic nerve and saw that it was solid. 18. The central canal , which runs through the garden from the top end, is wide and has a water depth of. 19. In Indianapolis the Monon connects with the Central Canal Towpath along the Indiana Central Canal , and the Fall Creek Trail. 20. Geographically, the district is divided into three parts viz, the Kohistan Tract, Central Canal Irrigation Tract and the Eastern Tract.