Earthworms are a type of annelids without obvious eyes. They belong to the phylum Invertebrates, Phylum Annelida, Subphylum Geminizoa, and Class Vermicomida. They mainly live in the soil. Although earthworms don't have complex eyes like humans or other animals, they do have a simple light-receiving organ called a "photoreceptor."
This photoreceptor is not a real eye, but a structure that senses light, helping the earthworm sense the intensity and direction of the surrounding light. The photoreceptors of earthworms are usually located at the front of the body and are called "front-end organs", which help them avoid light, find food, or avoid danger.
Earthworms mainly rely on other sensory organs to sense their surrounding environment, such as antennae, body surface receptors, and pressure sensors. These organs help earthworms sense soil moisture, temperature, the presence of chemicals, and the presence of plant debris, thereby helping them live in the soil and find food.
animal tags： earthworm
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