Which lymphatic trunk is connected to the cisterna chyli in the described pathway?

Which lymphatic trunk is connected to the cisterna chyli in the described pathway?

• A. Lumbar Trunks
• B. Intestinal Trunk
• C. Aortic Trunk
• D. Bronchomediastinal Trunk

Answer: (A)

The cisterna chyli is the collecting sac at the base of the thoracic duct that gathers lymph from the lower body. It primarily receives lymph from the lumbar trunks, which drain the legs, pelvis, and lower abdomen, and from the intestinal trunk, which drains the digestive organs. In the described pathway, the trunks feeding into the cisterna chyli are the lumbar trunks, providing the lymph that will then travel upward into the thoracic duct. While the intestinal trunk also contributes to the cisterna chyli, the lumbar trunks are the main direct connection in this context. The other options don’t feed into the cisterna chyli: the aortic trunk is an artery, and the bronchomediastinal trunk drains thoracic viscera higher up and does not connect at this basin.

The cisterna chyli is the collecting sac at the base of the thoracic duct that gathers lymph from the lower body. It primarily receives lymph from the lumbar trunks, which drain the legs, pelvis, and lower abdomen, and from the intestinal trunk, which drains the digestive organs. In the described pathway, the trunks feeding into the cisterna chyli are the lumbar trunks, providing the lymph that will then travel upward into the thoracic duct. While the intestinal trunk also contributes to the cisterna chyli, the lumbar trunks are the main direct connection in this context. The other options don’t feed into the cisterna chyli: the aortic trunk is an artery, and the bronchomediastinal trunk drains thoracic viscera higher up and does not connect at this basin.