Answer:
Nephridia are the main
excretory organs in earthworms. They are associated with excretoryand osmo regulatory
functions. The nephridia occur in all segments of earthworm exceptthe first two
segments. The three types of nephridia are found in earthworm according totheir
location.
They are
distinguished on the basis of being enter one phric (nitrogen waste expelled
input)and exonephric (nitrogen waste discharged outside directly).
Septal NephridiaThese
are present on both sides of inter segmental septa of the segmentstarting from
15th to the last that open into intestine. They are enteronephric.
Integumenatry
Nephridia These are attached to lining of the body wall of segment 3 to the
last that open on the body surface. They are exonephric.
Pharyngeal
NephridiaThese are present as a three paired tufts in the 4th, 5th and 6thsegments.
They are also enteronephric.
You need to login to perform this action.
You will be redirected in
3 sec