Classification Of Animals
Chapter Name : Animal Kingdom |
Sub Topic Code : 103_11_04_02_11 |
Topic Name : Classification Of Animals |
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Sub Topic Name : Phylum-Chordata |
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Introduction
Chordata is the phylum under Animal Kingdom which is distinguished by the presence of notochord, dorsal hollow nerve cord and paired pharyngeal gill slits.
Pre-Requisites:
Phylum Hemichordata and its features.
Activity:
Observe different kinds of chordates, flying, swimming and walking chordates.Try to spot the common features.
Real Life Question:
Are human beings chordates, if so, do humans show all the characteristics of chordates?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Notochord Nerve cord Gill slits Urochordata/Tunicata Cephalochordata Vertebrata Protochords | Sub-phylum of chordates in which notochord is present only in the larval tail. Sub-phylum of chordate in which notochord is present from head to toe and for lifetime. Sub-phylum of vertebrata in which notochord is present only in the embryonic stage and gets replaced by a bertebral column in adults. Urochordata and Cephalochordate, together are known as protochordata. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Observe the specimen of a foetus of a chordate like rabbit under the microscope. | Point out some chordate features developing. |
Places to visit :
Biology Laboratory
Practical examples around us
| Examples | Explainations |
|---|---|
| Human beings are chordates in which the notochord forms the vertebral column and the post-anal tail is found in the embryonic stage. |
What you learn in Theory:
The various distinguishing features of chordates.
What you learn in Practice:
Chordates are the most complex organisms that are divided into 3 sub-phyla and further into 7 classes.