Through their butts.
Earthworms require oxygen to breathe, and when soil is saturated with water, there is not enough air present for the earthworms to survive. The excess water limits the movement of air in the soil, causing oxygen levels to drop and suffocating the earthworms.
they breathe through there skin
the worm especially earthworms
Earthworms exchange oxygen and carbon dioxide through their skin. They absorb oxygen from the air and release carbon dioxide into the environment through their moist skin. This process is called cutaneous respiration.
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No, mother earthworms do not take care of their babies. Once they lay eggs, they leave them to develop and hatch on their own. Baby earthworms are self-sufficient and do not require parental care.
An earthworm's respiratory system consists of their skin, which is thin and moist, allowing for gas exchange with the environment. Oxygen is absorbed through the skin while carbon dioxide is released. There are no specialized respiratory organs such as lungs or gills in earthworms.
Earthworms respire and take in oxygen directly from the skin. Perspiration, sweating, happens with holes called nephridia that let out the sweat from the body. In the fall, earthworms go below the frost-line to migrate. They also hibernate down in the soil around six feet deep.
Earthworms live in the soil. Earthworms however will only live in soil where there is food, moisture, oxygen and a favourable temperature. If they don't have these things, they will go somewhere else.
Earthworms can typically survive in a refrigerator for a few hours to a couple of days before they die due to the cold temperatures and lack of oxygen.
Oxygen dissolves on the mucus of their skin and goes into their cardiovascular system. And since it goes through the mucus of their skin they have to stay moist.
Earthworms actually absorb oxygen through their moist skin from the soil.