Exploring Creation with Biology – Module 11 Invertebrates :D Ya’ll know you want to hear more about worms. Plus some other goodies I want to share.
- Kingdom: Animalia
- Phylum: Annelida (segmented worm)
- Class: Clitellata (has a clitellum)
- Order: Haplotaxida
- Family: Lumbricidae (33 species)
- Genus: Lumbricus
Some interesting facts I found around on the web.
- Length can be around 3 inches to 11 inches
- Roughly 2700 different kinds of earthworms
- In 1 acre of land there can be more than 1 million worms.
- Largest worm found was 22 feet long. South Africa. :shock:
- Worms are cold blooded
- Baby worms hatch from cacoons
- If their skin dries out they die
- If their skin absorbs too much water, they drown.
- They are made of 80% water.
- Worms are excellent composters and are used in many compost piles. See Vermicomposting.
- They aerate the soil and move nutrients around.
- They have both male and female sexual reproductive organs.
- They usually live 3 to 4 years.
And here are the awesome photos that I showed in a powerpoint. Yep, oversized in your face worm guts.
Pretty aren’t they? Feel free to copy and use in your class. You could even use them for wallpaper in your bedroom. You’re welcome!
Let’s back track to the beginning of the module, because I totally forgot to blog about it.
There are three types of symmetry: Spherical Symmetry, Radial Symmetry, and Bilateral Symmetry. Humans are Bilateral. To prove that we may look the same on the left and right sides, but actually are not, I took mugshots of each of the students. Them I promptly lost a couple somewhere inside my computer and had to use different photos that were not really mugshots.
I tried to slice the faces (That sounds bad, doesn’t it?), straight down through the nose. These kids didn’t look weird as previous students. I was seriously bummed about that, but you can still see a difference when the left sides are paired together and the right sides are paired together.
That was fun. :)
Now on to my favorite videos for this module. I whole heartily belive sometimes you need a video done in real life to get the wow factor in Biology. Just learning how a sponge pulls water through its walls and out its osculum isn’t as exciting as seeing the real thing.
Barrel Sponge Filtering Water – really nice video showing a sponge filtering water. Must see, of course.
Oh and jellyfish or other animals that have nematocysts that sting. Yeah, not so exciting as seeing the real thing. Here are two videos for you.
Nematocysts Firing – no sound
Jellyfish Stinging Microscopic Slow Motion – This video is just over 6 minutes but worth watching. It does speak of evolution, so please preview before showing to the students.
Moon Jellyfish Life Cycle – no sound.
As always, don’t read the comments on YouTube. Want a way to see the videos without all the comments and unwanted videos on the side? I use Keepvid to download the videos and then show them to the class.
Wow, this is a long post. Thank you for reading it!
Let me know if you have any questions.