Earthworm

Economic Importance of Earthworms

The earthworms are better known as the friend of farmers due to the following reasons:

• Earthworms improve soil fertility in different ways; therefore, they are of utmost importance in agriculture.
• These are used as bait and food. As bait is used in fishing. The earthworms were used as food by so many uncivilized people of the world and they are still used as food by the Macrea people.
• Several people earn by catching the earthworms and supplying them to scientific laboratories.

Animals have definite shapes and sizes. They are unbranched except for the sponges. Animals’ organs are generally internal, e.g., liver, heart, kidney, lungs, brain, stomach, etc. The growth of an animal’s body is limited, and it stops long before death. The growth regions are not localized. They can move bodily from one place to another. They lack chlorophyll and are heterotrophic in their mode of nutrition. Animals have distinct excretory organs. Asexual reproduction occurs only in the lower animals. Animals are classified according to some basics like the number of germ layers present in the embryo; the symmetry of the body of the organism, mode of origin of mouth. The broad classification of Animalia is based on common fundamental features. The phyla of the animal kingdom are Porifera, Cnidaria, Ctenophora, Platyhelminthes, Aschelminthes, Annelida, Arthropoda, Mollusca, Echinodermata, Hemichordata, and Chordata. Hereunder is a detailed explanation of the phylum Annelida.