A kidney is a pair of excretory organs found in the lower part of our body. Each kidney is reddish-brown, bean-shaped and has a length of 10–12 cm and a width of 5–6 cm. It weighs about 140 grams.
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Outer layer of the kidney is a tough capsule. Inside the kidney; outer cortex and inner medulla; zones are present. Medulla is divided into medullary pyramids.
Cortex extends in between the medullary as rental columns which are known as Columns of Bertini.
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• Important Notes 📒
Each kidney in human being is located between the levels of thoracic and third lumbar vertebra close to the dorsal inner wall of the alimentary canal. Its weight is 120 – 170 gm in males and 120 – 140 gm in females. Above the kidney Adrenal gland is present.
As the kidney is pushed by the liver. Its size is about 5 inches long.