What is one benefit of a double circulatory system?
- AIt uses less energy because blood flows through the heart only once in each circuit around the body.
- BConcentration gradients of solutes and gases are kept low.
- CDeoxygenated and oxygenated blood are separated to allow a high rate of oxygen supply to the tissues.
- DIt maintains high-pressure blood flow to the lungs and low-pressure blood flow to the body.