Question

es have marrow within them where new blood cells are made. these blood cells move throughout the body to distribute oxygen, nutrients, and wastes that diffuse into the blood other to maintain this example of equilibrium within the body? circulatory integumentary respiratory

Explanation:

The question is about body systems and equilibrium, related to how blood cells distribute substances. The circulatory system (option with "circulatory") is responsible for transporting blood, oxygen, nutrients, and wastes, matching the described process. The integumentary system is about skin/hair, and respiratory is about gas exchange (not direct distribution of nutrients/wastes via blood cells as described here).

Answer:

A. circulatory (assuming the first option is labeled A with "circulatory", adjust identifier if needed based on actual option labels)