32
UNIT 2
Basic Tissues
Figure 3-4.
Simple squamous epithelium in the medulla of the kidney.
EM,
3
8,900
This view of the medulla of the kidney provides two examples of
simple squamous epithelium
. The
endothelial cells
of the vessels
(vasa recta) are extremely thin except at the nucleus. Red blood cells, a neutrophil, and a platelet can be seen in the
lumen of the
blood vessel
. The cells that form the renal tubules shown here are squamous, but they are not as thin as the endothelial cells. These
tubules are thin segments of the
loop of Henle
. There is considerable diffusion of water between the vasa recta vessels and the renal
tubules in the medulla.
Lumen
Lumen
of thin
of thin
segment
segment
Lumen of the
blood vessel
Lumen of the
blood vessel
Lumen
of thin
segment
Lumen
of thin
segment
Lumen of the
blood vessel
Lumen of the
blood vessel
Endothelial cell
Basement membrane
Blood cells
Simple squamous cell
(lining epithelium
of loop of Henle)
Lumen
Lumen
of thin
of thin
segment
segment
Lumen
of thin
segment
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