BPoD has moved!

BPoD has recently changed our domain name - we can now be found at bpod.org.uk

Please update your bookmarks!

Now in our 13th year of bringing you beautiful imagery from biomedical science every day

Search the archive of over 4000 images

Self-repairing Symmetry
01 August 2015

Self-repairing Symmetry

When we injure ourselves, our bodies will try to repair the wound. But other creatures such as flatworms, and some lizards, are able to self-repair by regenerating new body parts. Jellyfish have a lot of natural predators and are even vulnerable to cannibalism by other jellyfish. They thus require an effective method of self-repair. A recent study on moon jellyfish has revealed a unique healing strategy now known as symmetrisation – a few days after losing an arm, the jellyfish had regained the radial symmetry of its body parts. However, rather than regenerating the lost arm, this was achieved by rearranging the remaining body parts. Pictured are three different species of Scyphozoan jellyfish (top row), the arms on one side were amputated, prompting the jellyfish to rearrange themselves, regaining their symmetry (bottom row). This process is believed to be driven by muscle contraction, and provides insight into different biological self-repair strategies.

Written by Helen Thomas

Search The Archive

Submit An Image

Follow on Tumblr

Follow on Instagram

What is BPoD?

BPoD stands for Biomedical Picture of the Day. Managed by the MRC Laboratory of Medical Sciences until Jul 2023, it is now run independently by a dedicated team of scientists and writers. The website aims to engage everyone, young and old, in the wonders of biology, and its influence on medicine. The ever-growing archive of more than 4000 research images documents over a decade of progress. Explore the collection and see what you discover. Images are kindly provided for inclusion on this website through the generosity of scientists across the globe.

Read More

BPoD is also available in Catalan at www.bpod.cat with translations by the University of Valencia.