EM 072 Mesothelium

MICROGRAPH

NAME

EM 072 Mesothelium

TISSUE

Mesothelium
(visceral peritoneum)

IMAGE SIZE

8,545 x 5,461 pixels
178 MB

FILE SIZES

31,014 KB (grayscale)
31,092 KB (color)

MAGNIFICATION

Unkown

PIXEL SIZE

1.709 nm

SOURCE

Stanley L. Erlandsen
University of Minnesota
Minneapolis, MN

CONTACT

Questions or comments should be sent to
tcbrelje@gmail.com

This web site is owned and operated by:

T. Clark Brelje, Ph.D.
University of Minnesota
Department of Genetics, Cell Biology and Development
6-160 Jackson Hall
321 Church St SE
Minneapolis, MN 55455

Robert L. Sorenson, Ph.D.
University of Minnesota
Department of Genetics, Cell Biology and Development
6-160 Jackson Hall
321 Church St SE
Minneapolis, MN 55455

Version 4.2

© 2005-2019.
T. Clark Brelje and Robert L. Sorenson.
All rights reserved.

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EM 072 Mesothelium

Mesothelium

Simple Squamous Epithelium

The mesothelium is a simple squamous epithelium that forms the lining of several body cavities (pleural, peritoneal, pericardial cavities, etc.).

Examine the morphology of this epithelial cell:

Plasma Membrane (dark green)
Nucleus (blue)

Nuclear Envelope (purple)

Mitochondria (red)
Endoplasmic Reticulum (cyan)
Cytoplasm (green)

The monolayer of flattened cells rests on a thin basal lamina supported by connective tissue.

Basal Lamina (dark purple) - an underlying network of reticular collagen IV fibrils. It appears as a dark line that separates the epithelium from the underlying connective tissue.
Connective Tissue (grayscale) - collagen fibers are seen in both cross and longitudinal sections.

Tight Junctions

Tight junctions (also known as zona occludens) form sites where the plasma membranes of adjacent cells come very close together. This forms an impermeable barrier to materials and fluid.

A small portion of another cell can be seen at the top of this image. The tight junctions appear as darker material along the plasma membranes of the two cells.