Chordata are animals that have a notochord at some stage of their life. They have a bilaterally symmetrical body with a triploblastic body wall. Chordates have a complete alimentary canal and digestive system with extracellular digestion. They have a hollow nerve cord located dorsal to the notochord. Sexual reproduction is dominant in chordates where males and females are separate.

1. ANIMAL KINGDOM
PHYLUM CHORDATA

2. Hello!
I am Swetha
Bachelors in Optometry
You can find me at @
https://unacademy.com/user/swetha.chandran304/courses

3. Place your screenshot here

4. Introduction, Other features, Digestion, Respiration,
Excretion, Nervous system, Reproduction
Synopsis

5. Introduction

6. INTRODUCTION
◈ The term “Chordata” was coined by “Frances Balfour”
◈ The term chordata is originated from two words of
Greek language ‘Chorda’ and ‘Ata’. Meaning of Chorda
is ‘at thick string’ and meaning of ata is ‘to have’ and
over all meaning of chordata is animals having
notochord.
◈ Chordates are the animal in which notochord is
present in any stage of their life – span.
◈ Most population in the fishes followed by the
amphibians.

7. Other features

8. OTHER FEATURES
◈ These animals are aquatic, terrestrial or aerial, free
living.
◈ Body is bilaterally symmetrical.
◈ Body wall is triploblastic.
◈ Metamerism is found in the arrangement of muscles in
embyonic stage and in adults it is found in
arrangement of vertebrae and ribs.

9. OTHER FEATURES
◈ Chordates may be cold blooded (Poikilothermous) e.g.
Amphibians, Reptiles and fishes are warm blooded
(Hemothermous) e.g. Birds and Mammals.
◈ Notochord is mesodermal in origin. It forms a primary
endoskeleton which gives support to central nervous
system and muscles.

10. Digestion

11. DIGESTION
◈ Ailmentary canal and digestive system is complete,
digestive glands are present and digestion is
extracellular.

12. Respiration

13. RESPIRATION
◈ In higher chordate animals, paired pharyngeal gill
clefts are found only in embryonal stage,these are
absent in adults.
◈ In aquatic chordates (pisces) and lower chordates,
pharyngeal gill clefts are present throughout their
life span for respiration.
◈ In terrestrial chordates, gill clefts are absent in
adults, because main respiratory organ is lung for
adults.

15. Excretion

16. EXCRETION
◈ Proto, meso and metanephric kidney are found in the
form of excretory organs.

17. Nervous system

18. NERVOUS SYSTEM
◈ In these animals, a hollow,
tubular structure is present
which is situated just
beneath the bodywall and
just above the notochord in
the dorsal side.
◈ Ganglia are absent in the
nerve cord of chordates.

19. Reproduction

20. REPRODUCTION
◈ Sexual reproduction is dominant.
◈ Males are females are separate.
◈ Metamorphosis or development of embryo is direct i.e.
without any larval stage (few exceptions)

21. Thanks!
Any questions?
You can find me at @
https://unacademy.com/user/swetha.chandran304/courses
Follow me or drop your queries in the comment box