1. Control of
Homeostasis &
Heart Rate
Also known as “The Blackworm Lab”
Ilana Saxe
The Lawrenceville School

2. Each lab station will have:
Depression
slides
counter
Lens paper
Cover slips
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.

3. Chemicals: You will test one chemical, three
times and share your data with the class.

4. 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

5. Blackworms in a 60 mm petri dish

6. 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…

7. 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: