Loading

Nematocyst

by caseywdunn, published

Nematocyst by caseywdunn Oct 9, 2012

Featured Thing!

1 Share
Download All Files

Thing Apps Enabled

Order This Printed View All Apps

License

Nematocyst by caseywdunn is licensed under the Creative Commons - Attribution license.

Use This Project

Give a Shout Out

If you print this Thing and display it in public proudly give attribution by printing and displaying this tag.

Print Thing Tag

Makes

Thing Statistics

25583Views 1647Downloads Found in Biology

Summary

If you have ever been stung by a jellyfish or coral you've already encountered one of these - a nematocyst. It is the stinging capsule found within specialized cells of Cnidaria (http://eol.org/pages/1745/overview). Nematocysts have poison filled harpoons that rapidly fire to attach to and incapacitate prey, or to deter predators.

This model, an homage to the anatomical relief models that adorn doctors' offices and junior high science classrooms, shows the nematocyst in three stages of discharge. First, the inverted harpoon is packed within the capsule. The harpoon is inside-out at this point. Second, a stimulus has led the capsule to pressurize, swinging open the operculum (the trap door at the top), and begin everting the poison filled thread. As it extends, it turns right-sideout, exposing hooked barbs as it goes. Third, the thread is fully extended. At this point, it would be lodged in the flesh of whatever brushed up against it.

This model was designed by Daniel Newman (http://www.danieljoelnewman.com), a certificate student in the Natural Science Illustration program at the Rhode Island School of Design, while doing an internship (facilitated by Amy Bartlet Wright, http://www.AmyBartlettWright.com) in my lab (http://dunnlab.org). His original concept sketches can be viewed above.

Visit http://creaturecast.org for more stories about the unexpected world of Biology. Thanks to Stefan Siebert and Bryn Bliska.

Instructions

We printed our models on a Makerbot Thing-O-Matic. You can go raftless, but we had better results with a raft.

More from Biology

view more

All Apps

3D Print your file with 3D Hubs, the world’s largest online marketplace for 3D printing services.

App Info Launch App

This App connects Thingiverse with Makeprintable, a cloud-based mesh repair service that analyzes, validates and repairs most common mesh errors that can occur when preparing a 3D design file for p...

App Info Launch App

Kiri:Moto is an integrated cloud-based slicer and tool-path generator for 3D Printing, CAM / CNC and Laser cutting. *** 3D printing mode provides model slicing and GCode output using built-in...

App Info Launch App
KiriMoto Thing App

With 3D Slash, you can edit 3d models like a stonecutter. A unique interface: as fun as a building game! The perfect tool for non-designers and children to create in 3D.

App Info Launch App

That is awesome! I will be printing that for use in my bio class for sure!

Any chance you will model an actual coral polyp?  

I can't upvote this enough!  :)

Top