What is common between earthworm and Periplaneta?
both have red coloured blood
both possess anal styles
both have malpighian tubules
both have a segmented body
Segmentation and Notochord -
Segmentation:
Based on metamerism, animals can be of following types:
Unsegmented:
Segmented:
Pseudosegmentation:
Segmentation is the division of the body into numerous transverse segments called metameres, as seen in annelids (earthworms) and arthropods (Periplaneta)