Fact 1: Nephrons are the structural and functional units of the kidneys.

Fact 2: Nephrons consist of vascular and tubular components.

Given the two facts above, answer the question "the structural and functional units of the kidneys consist of vascular and tubular what?" with the following options: 
- Epidermis
 - organ
 - epidermal
 - it needs them
 - critical organs
 - sensory neurons
 - components
 - Joules


 

       components  