Final answer:
The ulnar nerve, which is the union of the C8 and T1 ventral rami, is located on the medial side of the forearm and does not articulate with the carpal bones. The wrist flexors originate from the medial epicondyle of the humerus, and the term for a bundle of axons in the peripheral nervous system is a nerve.
Step-by-step explanation:
The union of the C8 and T1 ventral rami forms the ulnar nerve, which is found on the medial side of the forearm.
This nerve does not articulate directly with any of the carpal bones but is located near structures such as the brachial artery, which is the distal branch of the axillary artery.
The origin of the wrist flexors, relevant to the structures surrounding the ulnar and other nerves of the forearm, is the medial epicondyle of the humerus.
In the peripheral nervous system, a bundle of axons is referred to as a nerve.
As for the carpal tunnel, it's a passageway that allows muscle tendons and the median nerve to enter the hand from the anterior forearm, with the roof formed by the flexor retinaculum.