Module 13 in Exploring Creation Biology – Phylum Chordata. This is where vertebrates are found. Yes, this is where humans are classified, right along with this lovely Perch. 😀
Look at these lovies! Nice big specimens.
We pray for great weather when it is time for the Perch dissection. Yes, it does smell and having that smell in the co-op building just before lunch, is not a good thing. Trust me.
We use meat trays instead of dissection trays and plastic table covers for easy clean up. I REALLY hate cleaning dissection trays.
Here is my class getting ready for the fun.
After examining the outside and taking notes, we looked at the gills.
Then the students were to pull out one of the gills and have a look at it. Most were ok with doing that. It wasn’t an easy thing to do. Scissors and tweezers were needed to pull the gills out.
Then it was time to look in the inside. Eww…. Most of the students said they could not cut the through the scales. Most likely an excuse not to have to cut through it. 😀 They stopped complaining when I took an extra fish and made a perfect cut.
And as always once in side, the students play around. Fish guts, anyone?
Stomachs were cut open, but all were empty. I guess they did not get a last meal.
The brain has always been difficult for us to find. Somewhere in the mess below, is the brain.
After all work has been completed, we just roll everything up in the plastic table covers, through it in a bag and it is done. All that is left is a pile of tools to wash.
For this experiment and most other, students are required to type up their lab before coming to class. This assures me they will actually read what they are going to attempt.
To add to their lab write-up I printed these worksheets for them to label. I did have to white-out the words, so the student can fill it in. They had an exterior and interior diagram to labels.
The following websites are also a big help.
- Perch Dissection Lab ID Photos – This one is great, if you can’t figure out what you are looking at while in your Perch.
- Perch Dissection You Tube
- Biology Junction – Perch Dissection