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CHAPTER 19 - MALE REPRODUCTIVE SYSTEM
Histology Guide
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MICROSCOPE SLIDE

SLIDE NAME
MHS 267 Testis and Epididymis
TISSUE
Testis
Epididymis
(monkey)
STAIN
Hematoxylin & Eosin
IMAGE SIZE
129,061 x 73,964 pixels
35.6 GB
FILE SIZE
2.37 GB
OBJECTIVE
40x
PIXEL SIZE
0.3171 µm
SOURCE
T. Clark Brelje and Robert L. Sorenson
Department of Genetics, Cell Biology, and Development
School of Medicine
University of Minnesota
Minneapolis, MN

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Robert L. Sorenson, Ph.D.

Professor Emeritus
University of Minnesota
Department of Genetics, Cell Biology and Development
6-160 Jackson Hall
321 Church St SE
Minneapolis, MN 55455

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MHS 267 Testis and Epididymis

Epididymis

The is a single, coiled duct (~250 µm in diameter and ~4 meters in length) in which sperm undergo maturation (motility and capacitance). are stored in the tail of the epididymis.

  • - has a smooth luminal surface (unlike the "wavy" or "saw-toothed" appearance of the efferent ductules.
    • - tall columnar cells (~75 to 80 µm) with numerous modified, long microvilli called stereocilia extend from their luminal surface.
    • Basal Cells - small, round stem cells resting on the basement membrane.
  • Muscular Layer - gradually increases in thickness through the length of the duct.
    • Head and Body - consists of a of smooth muscle.
      • Spontaneous, rhythmic peristaltic contractions move sperm through the duct.
    • - consists of three layers (inner longitudinal, middle circular and outer longitudinal) of .
      • Neural stimulation induces contraction and forces sperm from the epididymis into the vas deferens.
  • - the single, coiled duct is embedded in connective tissue.
© 2005-2026. T. Clark Brelje and Robert L. Sorenson