Classification Of Animals
Chapter Name : Animal Kingdom |
Sub Topic Code : 103_11_04_02_08 |
Topic Name : Classification Of Animals |
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Sub Topic Name : Phylum-Mollusca |
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Introduction
The body of molluscs is generally covered by a calcareous shell.
Pre-Requisites:
Phylum arthropoda and its various unique characters.
Activity:
Observe some mollusc specimens in a biology lab/ museum/ water bodies. Try to spot the features common in all.
Real Life Question:
Are octopuses also molluscs?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Calcareous shell Visceral hump Radula Mantle Cavity Sensory tentacles Mantle | A shell on the body of molluscs composed of calcium carbonate. The mass of the body inside the shell that contains most organs like the heart, the reproductive and digestive organs etc. soft, spongy layer of skin over visceral hump space between visceral hump and mantle File-like rasping organ present in the mouth for feeding. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Observe the specimen of molluscs in your biology lab. | See the various parts of the body – head, muscular foot, visceral hump. |
Places to visit :
Biology Laboratory, Water bodies, Museum
Practical examples around us
| Examples | Explainations |
|---|---|
| Octopus is an example of a mollusc that lacks a shell. |
What you learn in Theory:
Mostly all molluscs have a calcareous shell.
What you learn in Practice:
Some molluscs are used as food material in various parts of the world.