Transverse Section Of Earthworm

The general colour of the body is brown but the dorsal surface is darker.

Transverse section of earthworm. They have a segmented tube like body made of ring like segments called annuli. This shows the position of the chaetae and the circular and longitudinal muscles. Transverse section through earthworm head 20x composite 8 comments.

Log in or sign up to leave a comment log in sign up. The septum between 14 15 segments is typical as all the septa that follow it are characterized by the presence of minute oval or circular sphinctered pores. This slide shows a cross section of the common earthworm lumbricus terrestris.

General anatomy of earthworm. Burns and scarring can occur if spilt on the skin and possibly. These segments are connected by a continuous gut a nerve and a blood vessel.

For purpose of dissection generally fresh animals are narcotized but preserved animals may also be used in the absence of fresh animals. There are around 6000 species of earthworm found all over the world. Light micrograph of a transverse section through the body of a round segmented earthworm lumbricus terrestris in the intestinal region.

The narcotized or preserved animals are placed in the dissecting tray and the two ends are stretched and pinned in such a way that the dorsal side remains above. Part of a transverse section of the earthworm. The nephridia empty to the outside via a openings called nephridiopores.

The body of pheretima is nearly circular in cross section and varies from 7 to 8 inches 18 19 cms in length. The intersegmental septa of 11 12 12 1 and 13 14 are transverse and non perforated. In the body cavity white are the excretory organs the nephridia kidney like organs pink right and left and the nerve cord pink lower centre.