A landmark to look for on the earthworm is its clitellum, something that looks like a band.
Well, an earthworm is one.
hyoid bone
The difference is that Metameres refers to the external segments of an earthworm, while septa refers to the internal parts of an Earthworm.
externally
Earthworm are like human cause they have a complete losed circulatory system. The earthworm has red blood that contains respiratory pigment similar to hemocfokin. External respiration in human must be moist and an earthworm keep its body surface.
earthworm
Earthworm does not have the back bone. Earthworm is invertebrate animal.
Earthworm does not have the back bone. Earthworm is invertebrate animal.
is an earthworm a vertibrate
A earthworm is an arthropod.
the brain is essential for the movement of the earthworm. If the brain of the earthworm is removed, the earthworm will move continuously without stop