Porifera is a phylum of aquatic invertebrate animals known as sponges. They are primitive multicellular organisms that lack true tissues and organs, with their bodies permeated by canals and cavities lined with flagellated cells. Sponges can have radial or no symmetry, and come in a variety of shapes including vase-like, cylindrical, or many branched forms. They are mostly marine but some live in freshwater. Sponges play an important role in aquatic ecosystems by filtering particles from water.

1. PORIFERA

2. WHAT IS PORIFERA
?
• A phylum of aquatic invertebrate animals
that compromises the sponges and having
a cellular grade of construction without
true tissue or organ formation but with
the body permeated by canals and passes
in its course through one or more cavities
lined with choanocytes.
Or,
• Porifera is a group of most primitive
animals that are commonly known as
‘Sponges.’They are pore bearing animals.

3. CHARACTERISTICS
1. Multicellular organisms with cellular
level of body organization.No distinct
tissues or organs.
2. Mostly marine,a few freshwater,all
aquatic.
3. Solitary or colonical,all sessile.
4. Body form vase-
like,cylindrical,tubular,cushion-
shaped,many branched etc.
5. Symmetry radial or no symmetry.
6. Choanocytes or flagellated collar cells
usually line special chambers.Sponges

4. Classes Of
PoriferaCalcera
Body shape cylindrical or vase-like
Body organization of asconoid,syconoid or luconoid type
Exclusively marine
Small-sized calcareous sponges
Scypha

5. Hexactinellida
Modcrate-sized glass sponges
Body shape cup,urn or vase-like
No dermal epithelium or exopinacoderm
Exclusively marine,many in deep sea
Classes Of Porifera
Hayalone

6. Classes Of
PoriferaDemonspongiae
Small to large-sized
Body shape like a vase
Spicules monaxon or tetraxon , never triaxon
All marine except freshwater family spongillidae
Oscarella

8. IMPORTANCE OF PORIFERA
1. Sponges play an important role in aquatic ecosystem , acting to filter
particles out of water(especially bacteria)
2. They are important in nutrient cycles in coral reef systems
3. Use as a cleaning material for washing dishes
4. Sponges are also used to absorb and catch oil leaks
5. They are used to maintain the most in agriculture like in radish and some
fast growing seeds
6. Homes of other marine life(shrimp , sea stars , snails)
7. Food for fishes , shrimp
8. Toxins that sponges release can be used in
-Antibiotics

9. THANK YOU

10. ANY QUESTIONS?

11. REFERENCES
WWW.UCMP.BERKLEY.EDU/PORIFERA/PORIFERALH.HTML
WWW.UCMP.BERKLEY.EDU/PORIFERA/PORIFERAMM.HTML
HTTP://ANIMALDIVERSITY.UMMZ.UMICH.EDU/ACCOUNTS/PORIF
ERA/
HTTP://TOLWEB.ORG/PORIFERA/2464
HTTP://PALEO.CORTLAND.EDU/TUTORIAL/PROTISTA/PORIFERA.
HTM
HTTP://WWW.EBIOMEDIA.COM/PROD/BOSPONGES.HTML
HTTP://WWW.INFUSION.ALLCONET.ORG/WEBQUEST/PHYLUMPO
RIFERA.HTML