What is the closest an earthworm has to sensory organs like ears or nose?

Earthworms lack traditional sensory organs like ears or noses, but they possess structures that serve similar functions. They have specialized cells called chemoreceptors located in their skin that help them detect chemical changes in their environment, functioning somewhat like a sense of smell. Additionally, they have light-sensitive cells that allow them to sense light intensity, which helps them avoid harsh sunlight. Overall, their sensory capabilities are more rudimentary compared to those of animals with distinct ears and noses.