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Sponges
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Classification:
Domain Eukarya
KingdomAnimalia
PhylumPorifiera – due to its pores
* More than 7,000 named species
*The rest of a sponge’s classification depends upon its characteristics.
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Characteristics
Full of pores
Most have no symmetry
Have NO digestive, circulatory or nervous system
Primitive skeleton (spicules)
Most live in salt water
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Morphology
1st level of cellular organization (No Tissue)
3 types of cellsCollar cells
Move water through sponge and trap food
Amoeboid cells Carry food and waste to and
from other cells
Out cells Epidermis – outer skin
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Eating
Filter feed – mainly on bacteria
Collar cells create currents
Water comes in pores and out osculum
Food is trapped by collar cells and picked up by amoeboid cells
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Reproduction
SexuallyHermaphroditic – both male and female
Each sponge acts as only one gender though it has both reproductive systems
Produce egg and sperm Sperm fertilizes eggs inside a “female” sponge
Asexually Budding (cloning)Regeneration
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Types of Sponges
Barrel Sponge
Tube Sponge
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Movement
Move only as a larva
Adults don’t move
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Uses
Bathing
Cleaning
Absorbing water
Surgical
Pharmaceutical