Question

activity 10: quiz
module: cardiovascular
topic: structures | type: multiple choice (mc)

what structure is highlighted?

a. cephalic v. and tributaries
b. thoracodorsal v.
c. brachial vv.
d. axillary v. and tributaries
e. axillary v.

Explanation:

Identify the highlighted anatomical region

The highlighted structure is located in the axillary region (armpit) and extends into the upper arm. It consists of a major blue-colored vessel (vein) along with several smaller venous branches draining into it.

Analyze the highlighted vessel and its branches

The main vessel highlighted in blue is the axillary vein, which runs through the axilla. In addition to the main trunk of the axillary vein, several smaller tributary vessels draining the thoracic wall and shoulder region are also highlighted in blue.

Compare with the multiple-choice options

Let's evaluate the given options:

• A. Cephalic v and tributaries: The cephalic vein runs more superficially along the lateral aspect of the arm and deltopectoral groove, which does not match this deep axillary dissection.
• B. Thoracodorsal v: This is only a single tributary, whereas the entire main axillary venous trunk and multiple branches are highlighted.
• C. Brachial vv: The brachial veins are located further down in the arm proper (deep to the biceps) and are typically paired, whereas this is the large single trunk in the armpit.
• D. Axillary v and tributaries: This option correctly identifies the main axillary vein along with the multiple highlighted smaller veins (tributaries) draining into it.
• E. Axillary v: While the axillary vein is highlighted, this option is less complete than option D because the highlighted blue region clearly includes the smaller branching tributary vessels as well.

Select the most accurate option

Since both the main axillary vein and its branching tributaries are highlighted in blue, option D is the most precise and complete description.

Answer:

• (A) Cephalic v and tributaries
• (B) Thoracodorsal v
• (C) Brachial vv
• (D) Axillary v and tributaries (Correct answer)
• (E) Axillary v