Yes, the transducer cable can be cut. However, if the transducer came with a connector do not cut it off. The molded on connector is waterproof. You need to cut and splice the cable away from the connector using Airmar's splash-proof Junction Box.
Veins carry blood back to the heart, having picked up (via capillaries) carbon dioxide as a waste product from the respiration of individual cells. Veins also carry nutrients that were absorbed through the lining of the intestines and into the blood carried in tiny capillaries.
Blood carries oxygen and many other substances around your body. Oxygen from your blood reacts with sugar in your cells to make energy. The waste product of this process, carbon dioxide, is carried away from your cells in your blood. Your heart is a single organ, but it acts as a double pump.