This is a diagram showing course of the nerves in the thorax. The structure indicated by the arrow labeled A is the_______________.

The spinal cord in adults ends at what vertebral level?

Which blood cell is involved in uptake of antigen-antibody complexes and in attacking helminthic or parasitic worms?

The spinal cord in adults ends at what vertebral level?

Identify this structure as it enters the hilum of the left lung.

Bifurcation of the trachea occurs at what vertebral level?

Identify this vein indicated by the white arrow.  

This is a diagram showing the anterior abdominal wall. The structure indicated by the arrow labeled D is the _______________.

The posterior fornix of the vagina lies in close proximity to__________.

What is the main function of the lymphatic system?