Write a short note on the types of nephrons.

(N/A) Based on their location in the kidney,nephrons are classified into two types:
$(A)$ Juxtamedullary Nephron: These constitute about $15\%$ of the total nephrons. They are large in size,and their Henle's loops are very long,extending deep into the medulla. They are associated with well-developed vasa recta.
$(B)$ Cortical Nephron: These constitute about $85\%$ of the total nephrons. Their Henle's loops are very short and extend only a little into the medulla. In these nephrons,the vasa recta is either absent or highly reduced.