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Teacher Resources

Planaria

Upon receiving, loosen cap and aerate culture. Planarians avoid strong light and
are much more active in diffuse light. Keep culture between 20 °C and 22 °C.

Planarians can be cultured in any type of bowl or large culture
dish. A shallow white enamel bowl filled with pond water or spring water is
suggested for easy viewing.

Planarians are hardy animals and are relatively easy to culture. They will thrive on fresh beef liver and/or hard-boiled egg yolks. Feeding once a week is usually adequate, depending on the number of individuals. A pea-sized portion of liver or yolk is sufficient for approximately 50 planarians. Allow the planarians to feed for one
hour. Then remove the excess food or transfer the worms to a fresh bowl of water
to avoid contamination. Planaria require relatively little maintenance
and can be used in a variety of interesting experiments, making them ideal for
the classroom.

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