The Ambulacral Groove
the ventral surface of a starfish is called oral You Jerk.
The linea alba is the aponeurosis that travels along the ventral abdominal midline.
That point would be the Challenger Deep, along the Mariana Trench.
The dorsal side of an earthworm is darker than the ventral side. This is because of the dorsal blood vessal that runs along the top of the digestive track and just under the skin. There is a ventral blood vessel, but it doesn't lie against the skin, but instead in between the ventral nerve cord and the digestive track.
Along the southern coast of Alaska is the Aleutian Trench.
the dorsal is along the back and is darker from the main blood stream, where as the ventral is along the front and is very light from the less blood in the certain vessel....so yeah
convergent
The position of the worms nerve cord compare with your nerve cord is it placement along the ventral surface of the body. Our spinal cord is protected by vertebra were the worms is unprotected.
The cilia on the ventral surface of flatworms enable gliding movements by creating a smooth and coordinated motion along a surface. The cilia generate small waves of movement that allow the flatworm to glide efficiently.
A convergent plate boundary creates a deep ocean trench along the edge of a continent. In this boundary type, an oceanic plate is forced beneath a continental plate, leading to the formation of the trench due to subduction.
It is often called a Trench, such as the Marianna's Trench.
Two worms come together along their ventral sides and become temporarily joined by the secretion of a "slime tube". Sperm is discharged from the seminal vesicles of both Worms's long seminal grooves on the ventral body surfaces, and enter the seminal receptacles of the other worms.