Question

why does the human cardiovascular system need two separate circulatory loops? one loop controls breathing, and the other controls digestion. one loop pumps only nutrients, and the other pumps only hormones. one loop moves blood to the lungs for gas exchange, and the other delivers blood to body systems.

Explanation:

• Analyze the first option: The cardiovascular system's loops don't control breathing (respiratory system) or digestion (digestive system) directly.
• Analyze the second option: Blood carries both nutrients and hormones, and both loops pump blood with various substances, not just one type.
• Analyze the third option: The human cardiovascular system has two loops: the pulmonary loop (moves blood to lungs for gas exchange) and the systemic loop (delivers blood to body systems). This matches the function of the two circulatory loops.

Answer:

The correct option is: One loop moves blood to the lungs for gas exchange, and the other delivers blood to body systems.