The esophagus is the tube that connects the pharynx to the crop of an earthworm.The pharynx is the muscular throat that pushes food down into the esophagus.The mouth cavity is the opening for the digestive tract that helps obtain nutrients from the soil.These are some of the internal parts that can be found in an earthworm:.They crunch it up in their muscular stomach, digest what they can (organic matter mixed with mineral fragments), and then eject the rest. Earthworms, unlike many other animals, eat the soil.They don’t split into two new worms, contrary to what some believe. When an earthworm loses one end of its body, it can grow another, but when it is cut in half, it dies.Earthworms can carry up to 20 eggs in a cocoon that can withstand adverse environmental conditions, but only one worm generally emerges.To share genetic information, they need to mate with another worm. However, they cannot fertilize themselves. Earthworms are hermaphrodites, which means they possess both male and female sex organs.The sun’s ultraviolet radiation is lethal to the thin-skinned earthworm, so they can only be found on the surface in dull, wet weather.
Key Facts & Information Amazing Earthworm Facts See the fact file below for more information on Earthworms, or alternatively, you can download our 22-page Earthworm worksheet pack to utilize within the classroom or home environment. Earthworms can be found in nearly every type of soil on the planet, as long as the moisture and organic content are adequate. Download the Earthworm Facts & WorksheetsĮarthworms are small, soil-dwelling invertebrates sensitive to the pH, waterlogging, compaction, rotation, tillage, and organic matter, all of which are good biological indicators of soil health.
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