Chapter 31, Problem 13A

Summary Introduction

To label:

The diagram of the earthworm.

Introduction:

An earthworm is a tube-shaped, segmented worm found in the phylum Annelida. Earthworms are commonly found living in soil, feeding on live and dead organic matter. An earthworm's digestive system runs through the length of its body. It conducts respiration through its skin.

Pictorial representation:

The figure can be labeled as follows:

a - cerebral ganglia

b − mouth

c − pharynx

d − accessory hearts

e − septa

f − gizzard

g − seminal receptacle

h − Blood vessels

i- intestine

j − ventral nerve cord

k − anus

l − clitellum