Question

module: cardiovascular
topic: structures | type: multiple choice (mc)

what structure is highlighted?

a. superficial palmar venous arch
b. ulnar collateral v.
c. median cubital v.
d. deep venous palmar arch
e. radial collateral v.

Explanation:

Identify the anatomical region

The image displays an anatomical model of the human forearm and hand, focusing on the venous system. The view is anterior (palmar), showing the deep and superficial veins of the forearm draining into or arising from the hand.

Analyze the highlighted structure

The highlighted structure is located in the palm of the hand. It forms a transverse vascular arch across the metacarpal region, situated deep to the long flexor tendons and superficial to the bases of the metacarpal bones. It connects the deep veins accompanying the radial and ulnar arteries. This deep position and its connection to the deep venae comitantes of the forearm identify it as the deep venous palmar arch.

Compare with the options

Let's evaluate the given multiple-choice options:

• A. Superficial palmar venous arch: This arch is located more superficially in the palm, closer to the palmar aponeurosis, and drains primarily into the superficial veins (basilic and cephalic).
• B. Ulnar collateral v.: Located in the arm/elbow region, not the hand.
• C. Median cubital v.: Located in the cubital fossa of the elbow, not the hand.
• D. Deep venous palmar arch: This matches the highlighted deep vascular arch in the palm of the hand, which receives the palmar metacarpal veins.
• E. Radial collateral v.: Located in the arm/elbow region, not the hand.

Relate to upper limb veins

Using the Upper Limb Venous System knowledge, we know that the deep veins of the hand form the deep venous palmar arch, which lies alongside the deep arterial arch and drains into the radial and ulnar veins of the forearm.

Answer:

• (A) Superficial palmar venous arch
• (B) Ulnar collateral v.
• (C) Median cubital v.
• (D) Deep venous palmar arch (Correct answer)
• (E) Radial collateral v.