Which organ system is primarily responsible for transporting nutrients, gases, and wastes throughout the body?

• A. Respiratory system
• B. Digestive system
• C. Circulatory system
• D. Nervous system

Answer: (C)

Verified step by step guidance

1. Step 1: Begin by identifying the primary function of each organ system listed in the problem. For example, the respiratory system is responsible for gas exchange (oxygen and carbon dioxide), the digestive system is responsible for breaking down food and absorbing nutrients, the nervous system is responsible for communication and control, and the circulatory system is responsible for transporting substances throughout the body.
2. Step 2: Focus on the key terms in the question: 'transporting nutrients, gases, and wastes.' This indicates the need for a system that moves substances to and from cells across the body.
3. Step 3: Recall that the circulatory system includes the heart, blood vessels, and blood. It is responsible for transporting oxygen from the lungs, nutrients from the digestive system, and waste products to excretory organs like the kidneys.
4. Step 4: Compare the functions of the other systems to confirm they do not primarily perform the task described. For example, the respiratory system facilitates gas exchange but does not transport nutrients or wastes, and the digestive system absorbs nutrients but does not transport gases or wastes.
5. Step 5: Conclude that the circulatory system is the correct answer because it fulfills the role of transporting nutrients, gases, and wastes throughout the body via blood circulation.