PORIFERA

PORIFERA:-

# this all animal called "sponges"
# Pore bearing animal two type : ostia and osculum
# don't have nervous, digestive, circulatory system
# have no symmetry
# cellular level of organism
# inversion occur during development
# absence of mouth
# This animal respire by body surfaces
# Excretion of that animal are by diffusion
# digestion is intra cellular
# external reproduction by external budding
# presence of collar cell or pinacoderm
# presence of asconoid, syconoid, leuconoid canal system

- Character:-

* Body type=vase like
* germ layer = Diploblastic
* body cavity= Spongocoel
* Feeding = filter feeder
* Size= varies 1cm to 1 m
* Symmetry= radially symmetry
* Habitat= maine, fresh water
* Nutrition= holotrophic
Respiration=aerobic, ammonotelic

@ Unique feature :-

- This all animal full with pores
- All animal in porifera are have canal system
- Most of this animal are fixed on the surface
- Endoderm is absent
- Multicelluler body

EXAMPLE:

1.) Scypha
2.) Grantia
3.) Euplectella
4.) Hyalonema
5.) Spongilla
6.) Euspongia

ECONOMIC IMPORTANCE:

# As food:
# commercial significance:
     Some are Used for washing cars, floor, walls etc as brush
# ornamental importance:
# As symboint