The term 'Biological Conduit' can be defined as a vessel or structure that facilitates the transfer of biological material. The crossword solution for this term is VAS, which stands for 'Vascular System'. The vascular system is a network of blood vessels and lymphatic vessels that transport oxygen, nutrients, and other substances throughout the body. It is an essential part of the circulatory system, and it is responsible for the delivery of oxygen and nutrients to cells and the removal of waste products from them.