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Beetles are abundant (some 350,000 named species!) and diverse. They can be pollinators, predators, scavengers, decomposers, or even parasites. They vary in size from so tiny you need a microscope to see them, to the size of an adult’s open hand.
Nanosellaspecies are only a few micrometers long! The current largest insect is the Goliath beetle which can grow to near 5 inches long and weigh 100 grams. That’s larger than most birds.
But What's Inside a Beetle?
In this activity, you will examine the parts of a scarab beetle (Mecynorrhina torquata) by cutting one open. You’ll also get to navigate through a beetle using MicroCT (that’s x-ray computer tomography), a tool that some scientists use to investigate why and how beetle body parts function the way they do.
Open the virtual dissection to get started exploring the beetle. You will be able to use several tools to open, remove, and zoom in on many body parts. Follow along with our Dissection Activity.
Make sure to hover your cursor over all parts of the beetle so you don't miss anything. You can also "glue" the beetle back together to take a step back and explore a new area.
Another Look with X-rays
Make sure to explore the x-ray view as well to get another look at what's inside of the beetle. Follow along on the dissection worksheet to make sure you haven't missed any areas you can explore. As you poke around, think about why certain body parts may be structured the way they are or located where they are.
Once you've completed the dissection, you should try out the x-ray beetle navigator page to get a feel for how scientists analyze insect anatomy with MicroCT technology.
As you explore all the tools and activities the Beetle Dissection has to offer, don't forget that all of this relates to real live insects. Perhaps if you go outside near your home town, you may find scarab beetles similar to the ones you see here. After completing these activities, just think how much more you will understand about how these beetles fly, breathe, and live.
Additional images via Wikimedia Commons. Longhorn beetle image by Zigah111.
- Article: Dissection Activities
- Author(s): Jon Harrison, Meghan Duell
- Publisher: Arizona State University School of Life Sciences Ask A Biologist
- Site name: ASU - Ask A Biologist
- Date published: January 12, 2016
- Date accessed: January 2, 2021
Jon Harrison, Meghan Duell. (2016, January 12). Dissection Activities. ASU - Ask A Biologist. Retrieved January 2, 2021 from /beetle-dissection-activities
Chicago Manual of Style
Jon Harrison, Meghan Duell. "Dissection Activities". ASU - Ask A Biologist. 12 January, 2016. /beetle-dissection-activities
MLA 2017 Style
Jon Harrison, Meghan Duell. "Dissection Activities". ASU - Ask A Biologist. 12 Jan 2016. ASU - Ask A Biologist, Web. 2 Jan 2021. /beetle-dissection-activities