You are presented with the question "things that have a what are the structural units of the kidneys?" and the following answer choices: 
- organ
 - epidermal
 - critical organs
 - it needs them
 - bioaerosols
 - sensory neurons
 - glomerulus
 - layers of fat

Now knowing that nephrons are the structural and functional units of the kidneys and each nephron has a glomerulus, choose the best answer.


 

       glomerulus  