Anatomy of Poriferans Montessori Info Booklet! This learning resource contains an informational booklet for the parts of a poriferan. Internal organs included in this booklet: poriferan, body, pores, osculum, and spicules. If you would like to expand on this topic, check out my my other Montessori anatomy and zoology resources. You can also check out my set of internal anatomy of vertebrates.