Sponges
Apr 01, 2015
Sponges
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.
Characteristics
Full of pores
Most have no symmetry
Have NO digestive, circulatory or nervous system
Primitive skeleton (spicules)
Most live in salt water
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
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
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
Types of Sponges
Barrel Sponge
Tube Sponge
Movement
Move only as a larva
Adults don’t move
Uses
Bathing
Cleaning
Absorbing water
Surgical
Pharmaceutical