How can you distinguish the dorsal and ventral sides of an earthworm?
Notice the presence of tiny bristles called setae which are found on the ventral surface of the earthworm. Another difference between the dorsal and ventral surface is the fact that the ventral surface is lighter in color. 2. Besides the mouth and anus, there are other openings in the earthworm’s body.Click to see full answer….
Notice the presence of tiny bristles called setae which are found on the ventral surface of the earthworm. Another difference between the dorsal and ventral surface is the fact that the ventral surface is lighter in color. 2. Besides the mouth and anus, there are other openings in the earthworm’s body.Click to see full answer. Correspondingly, how can you tell the dorsal side from the ventral side of a worm?1. Examine your earthworm and determine the dorsal and ventral sides. The ventral side appears flatter than the other side of the worm. The dorsal side is the worm’s rounded top.Likewise, is the dorsal side of an earthworm lighter than the ventral side? 3. Notice that the earthworm has a rounded dorsal (back) surface and a flatter ventral (belly) surface. Usually the dorsal surface is darker than the ventral surface (though sometimes this is obscured in the preservation process). Lightly rub your finger along the ventral side toward the posterior end of the worm. Also to know is, what external features allow you to identify the dorsal and ventral sides of the earthworm? Brain is on the dorsal surface; ventral nerve cord is on the ventral side.How can you distinguish between the anterior and posterior ends of an earthworm?Find the anterior (front) end of the earthworm by locating the fleshy bump over its mouth, called the prostomium. The posterior (back) end has a small hole where solid waste is expelled, called the anus. The length of the worm is made up of many tiny segments, each separated by a thin wall called a septum.
