Worms

Worms are a diverse group of animals that are distantly related. These elongated, tube-like creatures are lacking limbs, eyes, or other distinguishing features. In addition, worms live in many different environments, including soil and soilless waters. Read on to learn about some interesting facts about worms. You may not realize that these animals are as numerous as they seem. They are found in every corner of the world. Earthworms are the most widespread species. There are at least 2,700 different species, and they are classified as invertebrate animals. Their name derives from the Old English word wyrm. Because of their shape and size, they differ in size and shape. They have five pairs of hearts located in their forward part. Their skin is usually moist. They have a number of different internal organs, including veins and blood vessels. Unlike insects, worms don't have legs and eyes. They can feel light by detecting it through their skin, but if exposed to bright light for too long, they will die. Worms are able to replace lost body and head segments, though this occurs only in a few species. A worm's heart is called an aortic arch, and there are five segments in total. Each segment has a distinct purpose. While earthworms do not live in soil, they are important for maintaining soil fertility. They dig tunnels in the ground and eat the soil they gnaw. They also recycle the soil they live in, helping to make it rich with nutrients and minerals. This makes them essential for keeping a healthy garden. Unfortunately, a common predator of earthworms is the mole. Moles can eat up to fifty earthworms in a single day. Even more earthworms die during the winter, when they are not actively looking for food.