Identify structures No. 1- 3

4. Identify the type of cells pointed to by the blue arrow

5. To what Phylum and Class does this organism belong?

6. What body plan is shown in the arrangement of the internal canals of this organism?

 Answers

1. spongocoel

2. radial canal

3. apopyle

4. choanocytes

5. Phylum Porifera; Class Calcarea

6. sycon (syconoid)