Earthworms intake oxygen through their skin into the blood of their dorsal vessel. The dorsal vessel carries the oxygenated blood towards the aortic arches in the front of the worm. The aortic arches serve as the worm's heart, pumping blood through the ventral vessel toward the rear of the worm. Smaller vessels carry the blood from the ventral vein to the tissues and back to the dorsal vein.
All Vertebrates
Earthworms don't have spines, so their nerves don't travel through there.
Earthworms have a "closed" circulatory system that is coelemic fluid that flows through its body. Earthworms also respirate through their skin, and are true hermaphrodites.
earthworms have a closed circulatory system
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 breath through their skin, earthworms diffuse oxygen through a network of thin-walled capillaries which are found just under the skin.
urethra is the pathway of the human exretory system
Arteries are blood vessels that are located all around the body. Their function is to transport blood, with oxygen, around the body.
The pathway of oxygen is like a tube or pipe in the breathing system.
Large intestine Mouth Small intestine Stomach
The pathway of oxygen is like a tube or pipe in the breathing system.
first the food passes through your esophagus then to your small intestines and then your large intestines