Epithelial Tissue

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Stephen E. Fish, Ph.D. Mitchell L. Berk,
Ph.D. Marshall University J. C. E. School of
Medicine
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Note to instructors I use these PowerPoint
slides in histology lectures that I give to first
year medical students. Copy the slides, or just
the images into your own teaching media. We all
know that teaching science often requires
compromises and simplification for specific
student populations, or the requirements of a
specific course. Please feel free to offer
suggestions for improvements, corrections, or
additional illustrations. I would be pleased to
hear from anyone who finds my work useful, and am
always willing to make it better. Also, the
images have been compressed to screen resolution
to keep PowerPoint file size down, and I can
provide them at any resolution. Contact me about
the illustrations and Mitchell L. Berk about the
photomicrographs. Stephen E. Fish,
Ph.D. Fish_at_Marshall.edu Berk_at_Marshall.edu
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Pseudostratified Transitional Epithelia,
Glands
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Pseudostratified respiratory epithelia

• Pseudostratified columnar with cilia goblet
  cells
• Lines the airways

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Pseudostratified with cilia goblet cells
(respiratory epithelia)
Goblet cells
Ciliated columnar cells
Terminal bar
Basal stem cells
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Pseudostratified columnar with stereocilia in the
epididymis
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Transitional epithelia in the urinary tract

• Cell bodies are stacked
• But they all contact the basement membrane with a
  pedicel (cytoplasmic extension)

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Transitional epithelia
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Transitional epithelia is designed to be
stretched (relaxed vs. full bladder)
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Glands are epithelia develop as a downgrowth
from a surface
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Exocrine glands remain attached to the surface,
while endocrine glands separate
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Simple exocrine glands
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Cross section of large intestine glands
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Simple tubular glands in large intestine
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Simple coiled tubular gland- sweat gland
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Large exocrine gland anatomy Connective tissue
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Large exocrine gland anatomyNerves
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Large exocrine gland anatomy Blood supply
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Large exocrine gland anatomy Ductwork
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Large exocrine gland anatomy Serous secretion
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Large exocrine gland anatomy Mucous secretion
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Large exocrine gland anatomy Mixed serous
mucous secretion
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Compound acinar serous gland
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Compound acinar mucous gland
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Compound acinar gland with mixed serous mucous
acini
Mucous
Serous
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Example of secrtory cell Pancreatic acinar cells
secrete zymogen (digestive enzymes)