Through which two channels do lymph nodes pass lymph to venous blood?

Lymph nodes are crucial components of the lymphatic system that help filter lymph fluid as it passes through them. They eventually transport lymph to the bloodstream, facilitating essential immune functions and fluid balance in the body. The two primary channels through which lymph is drained into the venous blood are the thoracic duct and the right lymphatic duct.

The thoracic duct is the largest lymphatic vessel in the body, responsible for draining lymph from the majority of the body, including the left side of the head, neck, chest, left arm, and entire lower body. It empties into the left subclavian vein, which carries lymph back into the bloodstream.

The right lymphatic duct, on the other hand, drains lymph from the right side of the head, neck, and arm, and it drains into the right subclavian vein, allowing the lymph collected from that side to rejoin the blood circulation.

This anatomical arrangement ensures that lymph is effectively returned to the venous system, where it can help maintain proper fluid balance and support immune function.