The term 'blood conduit' refers to the vessels that transport blood throughout the body. The AORTA (5 letters) is the largest ARTERY in the body and carries oxygen-rich blood from the heart to the rest of the body. Arteries (6 letters) are blood vessels that carry oxygen-rich blood away from the heart to the body's organs and tissues. Veins (4 letters) are blood vessels that carry oxygen-poor blood back to the heart from the body's organs and tissues. Together, these three vessels form the blood conduit, allowing for the circulation of blood throughout the body.