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Gross Internal Structure - Coggle Diagram
Gross Internal Structure
Gross internal structure of the kidney, as
seen in coronal section through the organ,
exhibits that kidney tissue consists of an
outer region called the cortex and an inner
region called the medulla.
Medulla.
- is made up of triangular areas of renal
tissue that are called
the renal pyramids.
- Pyramids are 4–14 in number and separated
from each other by cortical columns of
Bertin.
- Pyramids show striations that pass radially
towards the apex.
- These striations are due to straight portion
of the nephron
and extend some distance upwards into the cortex where they are called
medullary rays.
-
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Lobe of kidney.
- Each pyramid, surrounded by a shell of
cortex, constitutes a lobe of the kidney.
- This lobulation is obvious in the
fetal kidney.