What is a Coelom and who has one? GUEST BLOG

Todays guest blogger is Taylor.

A Coelom is a body cavity that encloses organs in the visceral layer, allowing organs to develope.The Coelom forms when the lateral plate mesoderm splits and it seperates the body into an inner tube and outer tube. Animals that have Coeloms include earthworms and other annelids. Arthropods and mollusks also have a coelom, however theirs is more simplisitic and reduced.

Source: science.kennesaw.edu/~rmatson/Biol%203350/coelom.html

Can Worms Regenerate Themselves? GUEST BLOG

Today's Blog is written by Caitlyn.

Annelids are one of the most complex organisms. Take the palolo-worm for example. They are fully capable of regeneration when they are cut in half. This allows them to reproduce asexually by releasing an end of their tail. This then creates a complete organism. But only the tail can be cut off and regenerated because the worm must have the piece contains the clitellum and at least 10 segments behind the clitellum.

Source:http://invertebrates.si.edu/worms.htm