phylum porifera
the word porifera derived from two wordes :
( pourus means pores/holes )
( ifera means to bear )
These organisms are also called SPONGES.
- It means that porifera consist of those animals
which have pores on their body.
HABITAT :-
They are live in both fresh water and
in sea water ( marine ).
SKELETON :-
Mostly all organisms of porifera
have skeleton but some have lake it.Their
skeleton is made of tiny, needle-like splinters,
or a mesh of protein called spongin.
OSTIA :-
On the surface of body a small holes are
present which help in the entry of water etc
are called Ostia.
OSCULUM :- (Read.. APOPTOSIS)
The big opening which open to the inside of
body called Osculum.
FLAGELLA :-
On the tip of osculum a hairs like structures
present called flagella.
Flagella continue beating and occur entry of
food.
REPRODUCTION :-
Porifera have sexual and A-sexual both
reproduction and the sexual reproduction
is occur inside of the body.
FERTILIZATION :-
The fertilization occur by the fusion of OVA
and Sperm.
LOCOMOTION :-
The porifera are motionless or stationary and
are attached to other substances like rock etc.
RESPIRATION :-
The respiration occur through the surface of
the body.
IMPORTANCE OF SPONGES
- Sponges are used in washing and bathing.
- Sponges are used to absorb water .
- It is also used as surgical tool.
- Sponges have the ability to absorb noise so used in building walls.
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