Classification Of Animals
Chapter Name : Animal Kingdom |
Sub Topic Code : 103_11_04_02_06 |
Topic Name : Classification Of Animals |
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Sub Topic Name : Phylum-Annelida |
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Introduction
The name Annelida come from the word annulus meaning little rings. The members or annelida have their body segmented into little rings.
Pre-Requisites:
What are aschelminthes and what are its characters?
Activity:
Observe the specimens of nereis and earthworm in your biology lab. Spot the parapodia and the lack of it in earthworms. Spot the male and female earthworm.
Real Life Question:
Are all these rings identical with identical organs in them?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Metamerically segmented Nephridia Parapodia | Body divided into metameres with at least some organs repeated. Organs in annelids that help in osmoregulation and excretion. Lateral appendages in nereis that help in swimming. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Observe the cross section of an earthworm under the microscope. | Look for the various organs and organ systems; spot the organs which are repeated in various segments. |
Places to visit :
Biology Laboratory
Practical examples around us
| Examples | Explainations |
|---|---|
| Earthworm is an annelid that is beneficial to humans, hence it is called farmer’s friend. The blood sucking leech on the other hand is a parasite that can be sometimes used for medical purposes, so it’s both bad and good. |
What you learn in Theory:
Annelids can be both monoecious and dioeciois.
What you learn in Practice:
Annelids can be both bad and good for humans.