Question

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multiple choice question
which lymphatic structure is indicated by the arrow in the figure?
thoracic duct
right lymphatic duct
aorta
cisterna chyli

Explanation:

To determine the lymphatic structure, we analyze each option:

• Thoracic duct: Drains most of the body but is larger and on the left (not matching the arrow’s position here).
• Right lymphatic duct: Drains the right upper body (head, neck, arm, thorax) and is located on the right side, matching the arrow’s position in the figure.
• Aorta: A major artery (not a lymphatic structure), so eliminated.
• Cisterna chyli: A sac-like structure in the abdomen (not near the thoracic region shown), so eliminated.

Answer:

B. Right lymphatic duct