Final answer:
The three drains from the heart in the bypass circuit are the superior vena cava, the inferior vena cava, and the coronary sinus.
Step-by-step explanation:
The three drains from the heart in the bypass circuit are:
- The superior vena cava, which drains blood from the right and left internal jugular veins that come from the brain and from the veins that come from the arms.
- The inferior vena cava, which drains blood from the lower limbs and abdominopelvic region of the body.
- The coronary sinus, which drains most of the coronary veins that return systemic blood from the heart.