AP BIOLOGY

Detailed explanation-1: -Solution : The closed circulatory system is more efficient than the open circulatory system because in open circulatory systen, the blood flows through open spaces and channels whereas in closed circulatory system, the blood flows through proper blood vessels.

Detailed explanation-2: -The closed circulatory system has more advantages over the open circulatory system. 1. The blood transfers faster in the closed system, thus oxygen, nutritients, and wastes transport fast also.

Detailed explanation-3: -In a closed circulatory system, blood is transferred faster than in an open circulatory system. That is why the closed circulatory system is more advantageous than the open system.

Detailed explanation-4: -(d) Mammals and birds have the most efficient heart with four chambers that completely separate the oxygenated and deoxygenated blood; it pumps only oxygenated blood through the body and deoxygenated blood to the lungs.

Detailed explanation-5: -Compared to the open circulatory system, the closed circulatory system operates with much higher blood pressure, though it is said to be more efficient considering that it uses much less blood for even faster and higher levels of distribution.