Explain the external features of kidney in human beings.

Explanation

External features of mammal kidney are :
1) It is bean shaped and brown in colour.
2) Top of the kidneys you will observe adrenal gland.
3) 3 tubes come out from hilus. First one is ureter, second one is renal artery and third one is renal vein.
Internal features of kidney :
1) Each kidney is eonvex on the outer side and concave on the inner side.
2) Outer zone in kidney T.S. is light brown colour whereas inner zone is dark brown colour.
3) Outer zone is called cortex and inner dark zone is called medulla. Triangular calyces are present in medulla.
4) These medulla lead into ureter.
5) Ureters are whitish tube like structures.