Control of Homeostasis &

Heart RateAlso known as “The Blackworm Lab”

Ilana SaxeThe Lawrenceville School

Each lab station will have:

Depressionslides

counter

Cover slips

Lens paper

The scalpel is for cutting the end of the transfer pipette (you can also use scissors), remember to use a cover slip to trim the ends

of the worm.

Chemicals: You will test one chemical, three times and share your data with

the class.

Blackworm Holding Tanks

Trim the end of the transfer pipette to make it wider. This will make it easier to transfer the worms into the

60mm petri dish

Blackworms in a 60 mm petri dish

Once you have placed a blackworm on a flat slide,

removed the head and tail, and then placed it back on a depression

slide, under the microscope, you should

see this…

Segment of a Blackworm under the microscope

When you count the pulse chose one segment and count the number of times a wave passes through that specific point. For example, you might choose to focus here: