Which of the following is a feature shared by both the lymphatic and circulatory systems?

• A. They both deliver oxygen directly to body cells.
• B. They both produce red blood cells.
• C. They both transport fluids throughout the body.
• D. They both pump blood using the heart.

Answer: (C)

Verified step by step guidance

1. Understand the primary functions of the lymphatic and circulatory systems. The circulatory system is responsible for transporting blood, nutrients, oxygen, and waste products throughout the body, while the lymphatic system transports lymph, a fluid containing white blood cells and waste products, and plays a role in immune defense.
2. Analyze the first option: 'They both deliver oxygen directly to body cells.' The circulatory system delivers oxygen to body cells via red blood cells, but the lymphatic system does not have this function. Therefore, this option is incorrect.
3. Evaluate the second option: 'They both produce red blood cells.' Red blood cells are produced in the bone marrow, which is part of the skeletal system, not directly by the circulatory or lymphatic systems. This option is also incorrect.
4. Examine the third option: 'They both transport fluids throughout the body.' The circulatory system transports blood, while the lymphatic system transports lymph. Both systems are involved in fluid transport, making this option correct.
5. Consider the fourth option: 'They both pump blood using the heart.' The heart is part of the circulatory system and pumps blood, but the lymphatic system does not use the heart to pump lymph. Instead, lymph is moved through the body by muscle contractions and valves. This option is incorrect.