Why is decentralization (having a Nephridium in each section) a more successful adaptation in earthworms?
Having a decentralized excretory system is a more successful adaptation for an earthworm because it spreads out the earthworm’s ability to secrete enzymes throughout its body rather than in just one place. This is a very useful ability because it means the earthworm can easily get enzymes to any part of its body, this includes growth enzymes, enzymes that repair tissue damage, as well, this ability combined with the earthworms stomach that extends through most of its body creates a more efficient digestive system. This works best for earthworms when considering their more simple body type.
