Classification Of Animals
Chapter Name : Animal Kingdom |
Sub Topic Code : 103_11_04_02_13 |
Topic Name : Classification Of Animals |
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Sub Topic Name : Class-Osteichthyes |
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Introduction
Class osteichthyes includes all the bony fishes. Their body is streamlined and their body is covered by scales.
Pre-Requisites:
Class chondrichthyes and its features and the basis of classification of phylum Chordata into various classes.
Activity:
Observe the body of a bony fish.See the streamlined body; spot the scales and the operculum.
Real Life Question:
Are the fishes that we eat members of osteichthyes?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Operculum Air bladder | Hard bony flap covering the gills of bony fishes. Gas-filled organ that helps maintain buoyancy under water. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Visit a lab, a science centre or a museum. | Look at the air bladder of bony fishes. |
Places to visit :
Biology Laboratory, beaches, museum.
Practical examples around us
| Examples | Explainations |
|---|---|
| Rohu and Catla, popular food items are examples of class osteichthyes. |
What you learn in Theory:
The various distinguishing features of class osteichthyes like the presence of an operculum to protect the gills and the presence of air bladder for buoyancy.
What you learn in Practice:
Osteichthyes are the bony fishes which are served as a food item in many parts of the world.