In earthworm, typhlosole is a dorsal flap of the intestine that runs along most of its length. Its function is to increase intestine surface area for more efficient absorption of digested nutrients. In different earthworm families, the typhlosole appears to have multiple origins
No. They have segments.
The ventral nerve cord runs throughout an earthworm's body. When they start to branch from ganglion the nerve cords are still present throughout the segments.
Opinion 1. It varies depending on the species, but each has at least 37 segments. http://animals.howstuffworks.com/worms/earthworm-info.htm Opinion 2. Thats wrong, worms have over 100 segments. (i vote for #1.)
The seminal vesicles are found between segments 9 and 12. These produce a fluid in which the sperm can swim, and store the semen for later release.
Pair of nephridia in earthworm's segments excretes waste through pores in the skin, removing waste from the blood and body fluids.
Typhlosole.
increase intestine surface area for more efficent absorption of digested nutrients
No. They have segments.
Segments
In an adult worm, there may be more than 100 segments.
There are about 30 segments between the prostomium and clitellum of an earthworm. actually this question asked as differently as "How many segments are between the prostomium and clitellum of an earthworm?" see answer for this question.
Its function is to increase intestine surface area for more efficient absorption of digested nutrients. In different earthworm families, the typhlosole appears to have multiple origins.
increase intestine surface area for more efficent absorption of digested nutrients
The earthworm's diet is dirt and other minerals. The earthworm's skin has little segments.
There are seminal receptacles in segments nine and ten. In segments seven through fourteen, there are genitalia segments. The crop is in segments 15 and 16.
I believe they thin, membranous separations in between the earthworm segments. Functions would include structure within segments, and the connectivity of the skin and internal organs
It is located on segment 21.