Question

an embolus traveling down the radial artery will next reach the
multiple choice
axillary artery.
subclavian artery.
brachial artery.

Explanation:

The radial artery is a branch of the brachial artery. In the sequence of arterial flow, an embolus in the radial artery would travel back - upstream and next reach the brachial artery. The axillary artery is further upstream from the brachial artery and the subclavian artery is even more upstream.

Answer:

brachial artery.