Скачать или смотреть #Nereis

In this video lecture class I describe about External Morphology of Neries(Clam-Worm)
Also Known as rug worm, for BSc 1st year zoology students.

It is found on Sandy shore in shallow seas and most of time it leave in U Shaped barrows in sand in association with claims.


Neries is nocturnal and carnivorous. At night its head remains protruded out and sways in search of food. The food is caught by introvert of proboscis formed by protruding pharynx.

External morphology :

Shape & Size
Coloration
Segmentation: Metamerically segmentation about 80-200 metameres.

1 - Head: Prostomium & Peristomium
2 - Trunk: Parapodia & Nephridiopore
3 - Tail & Pygidium: Anal segment, contain anal cirri & Anus.

Lecture 2
   • #Nereis #Parapodia #Heteronereis Parapodia...  

Lecture 3
   • #Nereis:#Digestive System of Nereis/L-3/#B...  

Lecture 4
   • #Nereis -#Excretory System #Nephridia#L-4#...