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CHAPTER 4 - MUSCLE TISSUE
Histology Guide
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MICROSCOPE SLIDE

SLIDE NAME
MH 056 Muscle Types
TISSUE
Smooth Muscle (intestine; monkey)
Cardiac Muscle (human)
Skeletal Muscle (monkey)
STAIN
Phosphotungstic Acid/Hematoxylin
(PTAH)
IMAGE SIZE
69,840 x 42,276 pixels
11 GB
FILE SIZE
289 MB
OBJECTIVE
40x
PIXEL SIZE
0.3171 µm
SOURCE
Department of Genetics, Cell Biology, and Development
School of Medicine
University of Minnesota
Minneapolis, MN

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Robert L. Sorenson, Ph.D.

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University of Minnesota
Department of Genetics, Cell Biology and Development
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321 Church St SE
Minneapolis, MN 55455

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MH 056 Muscle Types

Examine the section of stained with phosphotungstic acid-hematoxylin (PTAH).

Are cells branched? [ + ]

Yes, unlike skeletal and smooth muscle cells

Is cardiac muscle striated? [ + ]

Yes, sarcomeres are present

What joins cardiac muscle cells? [ + ]

Intercalated disc - specialized regions of cell-to-cell adhesion

Name three of its components and their function? [ + ]

  • Fascia adherens – modified Z line that joins adjacent cells
  • Macula adherens (desmosomes) – attachment site of intermediate filaments that joins adjacent cells
  • Gap Junctions – electrical coupling between cells
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