Hydra Microscope Lab

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Hydra Microscope Lab

• Examine structures tissue layers of the hydra

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• Paper under scope
• NEVER USE COARSE ADJUSTMENT ON HIGH POWER
• If its fuzzy, its NOT focused!
• On low power with stage all the way down to take
  off or put on a slide

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LOW POWER Basal disk Tentacles Hypostome Mouth
Body stalk
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Bud
hypostome
Basal disk
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• Can you find BATTERIES?
• Knobs on the tentacles formed by clumps of
  cnidocytes
• Will discharge the nematocysts to paralyze and
  then capture prey
• May have to go up to high power

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Nematocysts--discharged
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Gastrovascular cavity
3 Mesoglea
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Gastrovascular cavity
Epidermis
Mesoglea
Gastrodermis