Describe the structure of a human kidney with the help of a labelled diagram.

Explanation

Reneal cortex : It is the outer region of kidney .

Renal medulla : It is lighter in colour and divided into numbers of pyramidal regions called renal pyramids ( 6 to 20).
Renal pyramid : Each pyrmid has wide base attached to the cortex and narrow apex directed towards an inner space called renal papillae.
Pyramid show striation that converge towards the apex . Column of bertini : Cortex continues inside medulla between pyramids.
Renal sinus or pelvis : Large funnel shaped space of the calyx is continued into pelvis situated near hilus.
The edge of the pelvis contains cup like extensions called major and minor calcyes . Each minor calyx receives urine from collecting ducts and about 7 - 8 collecting ducts join to form duct of bellini towards papilla of pyramid .