MORE ABOUT TYPES OF ANIMAL KINGDOM

TYPE OF ANIMAL KINGDOM

Members are commonly called sponges.
Generally marine but few occurs in fresh water. Spongilla
Asymmetrical and having cellular level of organisation.
Sponges have a water transport or water canal system.
In this system water enters through minute pores called ostia in the in the body wall into a central cavity (Spongocoel) from, where it goes out through osculum.
The water canal are lined by choanocytes ( collar cell ).
Food gathering, repiratory exchange and removeal of wastes occurs throygh canal system.
Digestion is intracellular.
The body is supported by skeletal made up of spiculles or spongin fibres.
Animal are hermaphrodite ( bisexual )
Fertilisation is natural and development in indirect (means have larval stage which is distinct from adult stage.)

E.X:- Sycon

2). Euspogia- ( Bath sponge )

3) Spongilla - ( fresh water sponge. )

Note:- Just behind the chonanocytic layer ameboid cell is present which help indigestion.

Generally marine and a few are fresh water forms.
Radially symmetrical, diploblastic and have tissue level of organisation.
The name cenideria is derived from the cnidoblast or cinndocytes ( which contain stinging capsules or nematocystes ) present on the tentacles and the body.
cnidoblast are used for anchorage ( means supporting ) , defence and for captures of prey.
Having central gastro-vascular cavity with a single opening called hypostome.
Digestion is extra-cellular and intracellular. Some cnideraians ( corals ) have a skeletal composed of caco3.
Coelentrate exhibits two basis body form ( dimorphic) called polyps and medusa.

Difference between polyps and medusa

Those cnidarian which exist in both form exhibit alternation of generation (metagenesis) I.e polyp produce medusa asexually and medusa form polyp sexually. E.x- Obelia, Physalia
Respriration and excretion takes place by diffusion of gases through body surface.
Aminotalic- (means excertory product is in the form of NH3).

E.X:- Physalia (portuguese man- of wear

2. Adamsia ( sea anemone )

3. Pennatula ( sea-pen ).

4. Gorgonia (sea-fan )

5. Meandrina ( brain coral )

They are commonly called sea walnuts or comb jellies. and exclusively marine.
Diploblastic with tissue level of organisation having radial symmetry.
Body has 8 external rows of cilliated comb plates for locomotion.
Animals are carnivores.
Biolumensence is well marked in ctenophora.
Special types of cell are present called (assocell. (colloblast) help in catching the prey.
Hermaphrodite and body sexual reproduction is found.
Fertilisatin is internal with indirect development.

Commonly called flatworm due to their dorsiventrally flattened body.
Mostly endoparasite found in animals including human beings, some forms are free living (Planaria)
Bilaterally symmetrical, triploblast and coelomate.
Parasitic form have hook and sockets, some of them absorb nutrients form the host directly through their body surface.
Digestive track is incomplete. (without anus.)
Specialized cell called flame cells or solenosite help in osmo osmoregulation and excretion.
Hermaphrodites, fertilisation is internal with indirect development
Nerve systems contain nerve ring nerve comb and pheripheral nerve (bladder like.)
Planaria posses high regeneration capacity.