1. PHYLUM PORIFERA

2. Phylum Porifera- Asconoid Type Sponge:
This simplest sponge type has it’s choanocytes located in it’s
spongocoel. Note buds (asexual reproduction) and many oscula (plural
of osculum) on this slide. [fig 1.3-A]

3. Phylum Porifera-Asconoid Type Sponge: note spicules, spongocoel, osculum & bud [fig 1.3-A]

4. Phylum Porifera- Asconoid Type Sponge:
This simplest sponge type has it’s choanocytes located in it’s
spongocoel. Its also a small sponge type. [fig 1.3-A]

5. Phylum Porifera- Syconoid Type Sponge:
An example of a syconoid-type sponge.This sponge type has it’s choanocytes located in its radial canals. Note the prominent spicules [fig 1.4]

6. Phylum Porifera-Syconoid Type Sponge:
a longitudinal & cross-sectional view. Note the osculum (A), spongocoel,
radial canals & the choanocytes lining the radial canals. A magnified view
of a radial canal showing individual choanocytes is included. [fig 1.4]

7. Phylum Porifera-Syconoid Type Sponge (CS):
This is a close-up of a cross-section through the radial canals of a syconoid-type sponge. Note the radial canals, the choanocytes lining canals, & osculum [fig 1.4]

8. Phylum Porifera- Leuconoid Type Sponge:
These are examples of the most complex sponge type. The choanocytes
are located in the many flagellated chambers. Any large sponge is most
likely a leuconoid- type sponge.