[phylum of sponges, the most primitive of multicellular animals; perforated with many pores to admit water, through which food is strained; all sponges are sessile and exhibit little detectable movement; most are hermaphroditic; organisms are a source of alkaloids, sterols and other natural products useful in medicine and biological research. ( CSP )]
UMLS (CSP) C0032699 Relation/PAR: Invertebrates