ANIMAL KINGDOM

on

ANIMAL KINGDOM

Eukaryotic, Multicellular, cell wall is absent and Heterotophytes.

11 phylum of Animals

  1. Parifera
  2. Coelenterata
  3. Ctenophora
  4. Platyhelminthes
  5. Aschelminthes
  6. Annelida
  7. Arthopoda
  8. Mollusca
  9. Echinodermata
  10. Hemichordata
  11. Chordata

Basic of classification:-

  • Classification on the basis of certain fundamental features:-
  1. Level of cellular organisation
  2. Body symmetry
  3. Nature of coilum
  4. Embryonyic layer/ germ layer
  5. Segmentation
  6. Absence or presence of notochord

Level of cellular organisation:- The member of kingdom animalia exhibits fallowing 4 level of organisation of cell.

  1. Cellular level:- Cell are arranged in loose aggerites e.x. Sponges
  2. Tissue level:- Cell are arrange into tissue show somee devision of level e.x. Ctenophora.
  3. Organ level:- Tissues are group to form organ. e.x. Platyhelminthes.
  4. Organ system level:- Organs are associated to form functional. ex. Annelida, Arthopoda, Mollusca, Ecohinodermata .
  • The organ system level in different group of animal exhibit varies pattern of complexlities.
  1. Incomplete digestive system:- only with one opening serve as both mouth and anus.
  2. Complete digestive system:- that means having two opening (mouth and anus)
  3. Open type of circulatory system:- The blood is pumped out of the heart and the tissue largan bathed in the blood.
  • Closed type of Circulatory system:- Blood is circolated through heart and vessels.

Body symmetry:- May exhibit 3 type of symmetry.

  1. Assymmetetrical:- Organism cannot divide into equal half medium plane. e.x. Sponges.
  2. Radical:_ Any plane passing through centre can divide into equal half. e.x Hydra.
  3. Bilateral symmetry:- Only one plane can divide the organism into equal half.  e.x. Annelida , Arthopoda etc.

  1. Embryonic layer/ germ layer:-
(During the formation of zygote to embryo the tissue of embryo is covered by germ layer so, in cellular level of organism it is not present.

TYPES:-

  1. Diploblastic:- Cells  are arranged in two embyonic layer- external ectoderm, internal endoderm.
  • B/W these two layer undifferiniated message, may be present. e.x Colenterates.
2.Triploblastic:- 3 layer are present in developing embryo i.e Ectoderm, Endoderm & Mesoderm.


Nature of Coelon:- Presence or Absence of cavity b/w the cavity or gut wall is very important in classification 
  • The body cavity which line by modern called colon.
  • Animals are group into 3 type based on presence or absence of body cavity.
  1. Acodomate:- Coelon is absent. E.x Platyhelminthes.
  2. Pseudocoelomate:- False coelomate is present I.e. Mesoderm is present in scattered pouches form.E.x. Aschelminthes.
  3. Coelomate:- Posses truecoelum e.x angelides to chordata


Segmentation:-
Body is externally and internally divided into segment with serial reparation at least some organ, then this phenomena is called mesomersim. E.x. Annelida, Arthopoda, Mollusca.

Notochord:-

It is a mesodermanly derived rod like st. form on dorsal side during embryonic development in some animal.
  • Animal with notochords are called chordata while those which lack it are called non-chordata e.x. Porifera to Echinodermata.

1.Basis of classification with example in short:-

1. Level of organisation 
  • Cellular cell:- E.x-Sponge
  • Tissue level:- E.x- Ctenophora and coelenterata
  • Organ level:- E.x- Platyhelminthes
  • Organ system level:- E.x- Aschelminthes to chordata.

2.Symmetry:-

Asymmetrical:- E.x- Sponge
Radial:- E.x- Coelentrata, Ctenophora 
Symmetry:-E.x- Platyhelminthes to Chordata

3. Germ layer 

(Made up of tissue outside the embryo during its development.)
1.Diploblastic:- E.x- C,C
2.Triploblastic:- E.x- Platyhelminthes to chordata
Note:- Porifera do not included in Germ layer because it is cellular level organisms whereas Germ layer including those animals which show tissue level of organisation 

4. Colom

Aceolomate:- E.x- Porifera to P
Pseudoceolomate:- E.x- Aschelminthes 
Ceolomate:- E.x- Annelida to chordata.

5. Segmentation:-

Segmentated- Annelida to chordata
Non-Segmentated- From Porifera to Aschelminthes. 

6. Notochord:- 

Non-chordata- E.x- 1 to 10th phylum.
Chordata:- E.x- Chordata

Comments

Post a Comment

Followers