With many groans, I handed out the worms. This tube of 12″ Earthworms is from www.carolina.com and all were in excellent juicy shape!
Once the first one was out, most of the students were looking forward to the experiment.
Except one. I had to remind everyone in the class that there are NO WIMPY kids in my Biology class.
I talked a few minutes about each of the systems: Digestive, Nervous, Circulatory, and Reproductive. The slimy tube reference in the Reproductive System didn’t go over too well with the students. I kinda went very fast through that system and told them to make sure they read that section. LOL
First thing first, touch it. 😀 You can name it if you want to.
The dissection lab and the write-up will be the hardest grade the student will earn. I warned them with this email message. Feel free to copy it to you students. It worked wonders and all had their lab write-ups prior to class. Next week, I’ll get their final write-ups and let you know how they did.
Ok Students, listen up!
You must have your Exp. 11.3 Worm Dissection, written up before coming to class. You must read this module before coming to class. For this experiment you will only be using your notes. Since lab write-ups are to be written in such a way that anyone can pick it up and perform the experiment, you should be able to complete this assignment without any help from me.
Points to remember:
- Your lab must be written-up prior to class.
- Leave your books at home. You don’t need them in class this Tuesday.
- You will be sketching. Please bring UNLINED paper for your sketches. This is a High School college prep course. Step up to it.
- You will make the sketches in a reasonable size. One inch sketches are not acceptable. Huge kindergarten sketches are not acceptable.
- Use pencil, not a pen. Cover your pencil in plastic wrap to protect it from worm guts. I do have gloves, but they are not to be used for the pencil.
- You will take your time with this dissection. You will make detailed sketches. You will not make sloppy sketches. You will learn something. You will NOT finish this in 5 minutes.
- If you need a surgical mask, please bring it.
- If you need to step out of the room for some air, please do so and come right back.
- Every student will dissect their own worm. Every student will complete this dissection. I know there are no wimpy students in my Biology class.
You have been writing labs since the beginning of this class. Some of you have done well, some of you have done ok, and some of you have not done so well. The dissection write-ups will be graded the hardest out of all our write-ups. Please keep this in mind and do an excellent job with your write-ups.
Getting the first cut is a little nerve wracking for the kids. It isn’t easy to judge how far you should cut through the skin, but it all went well.
Except for the ones that went a little too far. Yep, not much left to see there! Thankfully, I had visuals. Bigger than life photos of previous dissections. I will post them tomorrow for your enjoyment. My favorite videos for this module wil also be posted. 🙂
Only one student brought in a mask. I couldn’t smell it very much, but some of the kids could. Carolina Biologicals do not use You can read about our specimens from Carolina here.
Quotes from Carolina: Carolina’s Perfect Solution® – an alternative to formaldehyde – is a revolutionary fixative that produces superior specimens while improving the safety of your classroom or lab. Tissues and organs are extremely lifelike and retain better color and texture than with other preparations.
Here is a pretty good cut, but this student needed to cut a few more of the septa. The Septa is the string like thing that separates the worm into sections. Once you slice those, your worm can be pinned back and expose the organs better. Was that TMI?
I would love to say that ALL the students enjoyed this, but… I can’t. Guess who this kid belongs to.