Question

lewis is exercising and his muscles need oxygen. which best describes how systems interact to bring his body into homeostasis?
the circulatory system brings oxygen to the respiratory system, which delivers oxygen to the muscular system.
the respiratory system brings oxygen to the circulatory system, which delivers oxygen to the muscular system.
the respiratory system brings oxygen to the circulatory system, which delivers oxygen to the skeletal system.
the circulatory system brings oxygen to the respiratory system, which delivers oxygen to the skeletal system.

Explanation:

To solve this, we analyze the interaction of body systems:

1. The respiratory system (lungs, etc.) takes in oxygen.
2. The circulatory system (heart, blood vessels) transports this oxygen from the respiratory system to the muscular system (where muscles, like during exercise, need oxygen for respiration).

• Option 1 is wrong: Circulatory system doesn't bring oxygen to respiratory (respiratory takes in oxygen first).
• Option 3 is wrong: Muscles are part of muscular, not skeletal system.
• Option 4 is wrong: Circulatory→respiratory direction is wrong, and skeletal system is not the target here.
• Option 2 is correct: Respiratory gets oxygen, circulatory delivers it to muscular system.

Answer:

B. The respiratory system brings oxygen to the circulatory system, which delivers oxygen to the muscular system.