1. The problem asks for the name of the veins inside the human heart. 2. In human anatomy, veins that carry blood into the heart are called "cardiac veins". 3. These veins collect deoxygenated blood from the heart muscle (myocardium) and drain it into the right atrium. 4. The main cardiac veins include the great cardiac vein, middle cardiac vein, small cardiac vein, and others. 5. They all eventually drain into the coronary sinus, which empties into the right atrium. 6. Therefore, the veins inside the human heart are called cardiac veins.