What structure of the nephron is indicated with “E”?

Spermatogonia divide by mitosis.

During an emergency situation, how would a healthcare professional go about triaging burn victims?

The sternum would be considered what type of bone?

What hormone acts on sodium re-absorption in “F”? 

Juxtamedullary nephrons are important for production of concentrated urine when you are dehydrated.

Name structure “c” from the figure:

Corpus luteum is maintained by this embryonic structure in the case of pregnancy:

Which cells/structures  produce testosterone?

What is the major extracellular cation?