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CHAPTER 15 - LIVER AND GALLBLADDER
Histology Guide
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MICROGRAPH

NAME
EM 092 Gallbladder
TISSUE
Gallbladder
IMAGE SIZE
x 8,319 pixels
339 MB
FILE SIZES
58,960 KB (grayscale)
64,222 KB (color)
MAGNIFICATION
Unknown
PIXEL SIZE
4.781 nm
SOURCE
Stanley L. Erlandsen
Department of Genetics, Cell Biology and Development
School of Medicine
University of Minnesota
Minneapolis, MN

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EM 092 Gallbladder

Gallbladder

Transmission electron micrograph (TEM) of the simple columnar epithelium (active) that lines the interior of the gallbladder.

During the storage of bile in the gallbladder, it is concentrated by the reabsorption of water. The basolateral surfaces of the epithelial cells contain numerous Na+-ATPase pumps. They increase the concentration of sodium ions in the extracellular space between cells. This osmotic gradient causes water to diffuse out of the lumen.

Unlike the inactive epithelium (see EM 083 Gallbladder), develop between the basolateral surfaces of the epithelial cells.

  • Microvilli - cover the apical surface of the cells
  • (blue)
  • Golgi Apparatus (yellow) - small in these non-secretory cells (not visible in this section)
  • Mitochondria (,) - numerous to provide energy for the transport of sodium ions
  • Endoplasmic Reticulum (cyan)
  • Cytoplasm (green)

An can also be seen in the epithelium.

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