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As a class go over safety rules about dissecting. Emphasize that each
student is responsible for their equipment and use of it.
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Together as a class go over the information about squid in the library
books and the teacher text in this lesson plan. Answer any questions
that the students may have about the parts of the squid. On the
blackboard eraser well place the library books open so that the students
can refer to the dissected pictures in the books while they are
dissecting their squid.
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Have each team lay the squid on newspaper with the funnel facing up.
Separate the two long tentacles from the eight shorter arms.
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Using a scalpel or scissors, have the students cut through the mantle
from one end to the other, to one side of the ridge along the midline.
Fold back the sides of the mantle.
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Have the students feel the mantle and locate the long, hard object
within it. This is the pen. Remove the clear, plasticlike pen by
pulling it away from the mantle.
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Then have the students locate and examine all the structures of the
squid.
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Have the students remove the ink sac, gills, and the tip of a
tentacle. Ask them to take a closer look at these parts through a hand
lens.
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Ask each student to draw a rough picture of the dissected squid and
label the various parts of the squid.
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