Scientists find it difficult to define exactly what worms are. They may best be described as elongated, boneless animals, an undersurface fitted for crawling, and a more or less definite head end. One other important feature of worms is that they can be divided into two similar portions, their right and left sides. So when you have something that fits this description, you have a worm.
Woes vary in size from microscopic to about 12 meters long. They vary in color from transparency to dark brown, green, and red. Women form several distinct primary groups of animals. The most important of these are the flatworms; a group that includes the threadworms, roundworms, and hookworms; and the segmented worms.
The flatworms have flattened bodies. Each one contains both sexes within itself. Some of them are free-living, others are parasites. Among the parasitic flatworms are tapeworms. It usually lives in the intestines of backboned animals, such as men and dogs.
The threadworms are a large group of thread-like worms, varying in size from hardly visible species to others a few meters long. Among the most dangerous worms are the pinworms, trichina, Guinea worm, and the common roundworms. They cause serious illness to man and several animals. The earthworms, with which we are most familiar, are among man’s best friends. By burrowing into the soil, they loosen it for more effective growth of crops.
Do Worms Bite Humans?
Worms don’t bite. They also don’t sting.