Question

question 10
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into which vessel does the thoracic duct drain?
right subclavian vein
right jugular vein
left subclavian vein
left jugular vein

Explanation:

The thoracic duct is the largest lymphatic vessel in the body. It drains into the junction of the left subclavian vein and the left internal jugular vein. Among the given options, the left subclavian vein is the correct vessel as it is part of this drainage site. The right subclavian vein and right jugular vein are not related to the thoracic duct's drainage. The left jugular vein is not the main vessel (the junction with subclavian is key, and the option here is only left jugular).

Answer:

Left subclavian vein