Question

midterm
saved
g15 lung model with larynx, 7 part © 3b scientific gmbh, germany, 2017, apr photo © mcgraw-hill education
www.3bscientific.com
which structure is highlighted and indicated by the leader line?
multiple choice
superior vena cava
internal jugular veins
brachiocephalic veins
pulmonary trunk
heart

Explanation:

To determine the highlighted structure, we analyze each option:

• Superior vena cava: Drains into the right atrium, but the highlighted structure's shape and position don't match.
• Internal jugular veins: Drain the brain, neck, and face, and their position/shape differ from the highlighted one.
• Brachiocephalic veins: Formed by the union of internal jugular and subclavian veins, and their Y - shaped (or V - shaped) appearance near the heart and lungs matches the highlighted structure in the diagram.
• Pulmonary trunk: Carries deoxygenated blood from the right ventricle, has a different structure and position.
• Heart: The highlighted structure is a vein, not the heart itself.

Answer:

C. Brachiocephalic veins