The earthworm’s body is well adapted for life in the soil. Click on the brand to watch images and learn more.

Click the green button to view what’s ~ above the outside of an earthworm.


*

Transcript

Pharynx

Earthworms press the pharynx the end of their mouths come grasp centregalilee.comanize of essential matter. They pull the food ago into your mouths and also then wet it v saliva.

You are watching: Which body part of the earthworm coordinates movement

Acknowledgement: Sara l Roggemann, 3 Flowers Photography

Gizzard

Earthworms carry out not have actually teeth, so they usage the strong muscles of the gizzard (and grains of sand and soil) come grind up their food.

Acknowledgement: Sara together Roggemann, 3 Flowers Photography

Intestine

Once the food is ground up, it moves into the intestine whereby digestive fluids proceed to malfunction the food so it deserve to be absorbed.

Acknowledgement: Sara l Roggemann, three Flowers Photography

Aortic arches

Most earthworm types have 5 aortic arches or ‘hearts’ that relocate blood approximately the body. The number of aortic arches varies among species.

Acknowledgement: Sara together Roggemann, 3 Flowers Photography

Dorsal and ventral blood vessels

The dorsal blood vessel runs along the length of the top side that the earthworm. The contracts and pumps blood come the aortic arches. The ventral blood ship runs follow me the lower length of the earthworm.

Acknowledgement: Sara together Roggemann, 3 Flowers Photography

Cerebral ganglion

The earthworm’s ‘brain’. Earthworms have a simple nervous system. The cerebral ganglion is linked to a ventral nerve cord that runs the size of the body. Each segment is connected to this cord, allowing earthworms come move and also respond come light, touch, chemicals, vibrations and more.

Acknowledgement: Sara l Roggemann, 3 Flowers Photography

Circular muscles

Circular muscle surround each segment. When earthworms squeeze this muscles, they become long and also thin. Circular muscles alternate with longitudinal muscles to help earthworms move.

See more: How Were Sumerian Religion And Government Connected, Sumerian: Government

Longitudinal muscles

Longitudinal muscles run the length of the earthworm. As soon as these muscles contract, earthworms end up being short and fat. Longitudinal muscles alternate with circular muscle to help earthworms move.