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Multiple Choice
Which of the following structures is part of the lymphatic system found in both the abdominal and thoracic regions?
A
Thoracic duct
B
Esophagus
C
Aortic arch
D
Pancreas
Verified step by step guidance
1
Step 1: Begin by understanding the lymphatic system, which is responsible for transporting lymph, a fluid containing white blood cells, throughout the body. It plays a key role in immune function and fluid balance.
Step 2: Identify the thoracic duct as a major structure of the lymphatic system. It is the largest lymphatic vessel in the body and is responsible for draining lymph from most of the body into the venous system.
Step 3: Recognize the anatomical location of the thoracic duct. It spans both the abdominal and thoracic regions, making it unique among the options provided.
Step 4: Evaluate the other options: The esophagus is part of the digestive system, the aortic arch is part of the cardiovascular system, and the pancreas is part of the endocrine and digestive systems. None of these are part of the lymphatic system.
Step 5: Conclude that the thoracic duct is the correct answer because it is the only structure listed that is part of the lymphatic system and found in both the abdominal and thoracic regions.