Answer: Glomerulus.
Explanation: Kidney is a bit purplish- brown kind of organ located just below the ribs at the middle back of the human body.
The main function of kidney is to filter the waste from the blood and helps in the formation of urine. The kidney removes the urea from the blood by the help of the small filtering units called as nephrons.
Each of the structure is formed by small capillaries called as glomerulus.
