Fish Heath Management Lab 5: Histology (microanatomy) Tarah Johnson March 2 nd, 2009.
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Transcript of Fish Heath Management Lab 5: Histology (microanatomy) Tarah Johnson March 2 nd, 2009.
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Fish Heath Management Lab 5: Histology (microanatomy)
Tarah JohnsonMarch 2nd, 2009
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Objectives
• Be able to microscopically identify cells and structures in the liver, kidney, and gills
• Have the opportunity to microscopically examine histological sections of other fish organs (eyes, head, muscle, etc.)
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Liver
• Hepatocytes• Hepatic Sinusoid• Central Vein and or Hepatic Portal Vein• Bile Duct• Arteriole• Glycogen Vacuole
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Central Vein and Hepatic Sinusoids
Erythrocytes visible within the central vein
Hepatic sinusoids
400x
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Bile Duct Arteriole
A. Glycogen Vacuole
A
400x
Erythrocytes visible within arteriole
400x
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Head Kidney
• Interrenal gland• Chromaffin cell• Postcardinal vein• Hematopoietic tissue
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A
B
C
A. Interrenal Gland
B. Chromaffin Cell
C. Postcardinal vein
400x
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A. Postcardinal vein
B. Hematopoietic tissue
40x
A B
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Trunk Kidney
• Nephron (may not observe a complete nephron): Renal corpuscle, proximal tube, distal tubule, and collecting duct
• Renal Corpuscle:Glomerulus, Bowman’s capsule, basement membrane of glomerulus
• Melanocytes• Collecting duct and/or Mesonephric duct• Connective tissue
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AB
C
A. Renal Corpuscle
B. Proximal Tubule
C. Distal Tubule
400x
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400xA. Glomerulus
B. Basement membrane of glomerulus
C. Bowman’s capsule
A
C
B
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A
B
A. Mesonephric Duct
B. Melanocytes
C. Connective tissue
400x
C
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Gills
• Filament• Lamella• Goblet (or mucous) cell• Chloride cell• Pillar (or pilaster) cell• Gill filament cartilage
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Gill filaments and lamellae
Lamella
A
A. Filament cartilage
B. Pillar cell
C. Chloride cell
B
40x
400x
C
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Mucous or Goblet Cells
400x
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Laboratory Steps
• Use proper microscope handling procedures (distributed in Lab 2)
• Examine histology slides of liver, kidney, and gills
• Examine additional histology slides of other organs
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Be Sure to…
• Clean oil immersion lenses• Clean slides and return to proper case (the
same one you took it from)• Turn off microscopes and leave on low power
objective when done