Answer:
Human kidney are
reddish-brown, bean-shaped structures situated between the last thoracic and
third lumbar vertebra close to the dorsal inner wall of the abdominal cavity.
Each kidney of an
adult human measures 10-12 cm in length, 5-7 cm in width, 2-3 cm in thickness
with an average weight of 120-170 gm.
The kidney
is .covered by a fibrous connective tissue, the renal capsula, which protect
the kidney. Internally, it consists of outer dark cortex and an inner light
medulla, both containing nephron (structural and functional units of kidney.
The median concave
border of a kidney contains a notch called hilum. Through which ureter blood
vessels and urinitus.
The renal
cortex is granular in appearance and contains convoluted tubules and Malpighi
an corpuscles. The renal medulla contains loop of Henie, collecting ducts and
tubules and ducts of Bellini.
Medulla is
divided into conical masses, the medullary pyramids which further form papillae
The papillae form calyces, which join to renal pelvis leading to ureter.
Between the medullary pyramids, cortex extends into medulla and forms renal
columns which are called as column of Bertini.
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