Multicellular, asymmetrical & organised at the cellular level.
Being marine, nevre-cell- less & sessile sure needs skill !
Lined with many a pinaco, poro, choano & ambeo –cyte ,
Having a spongocoel & a skeleton of spicules is their birth-right !
A Canal System for respiration, excretion and ingestion.
Ascon, Sycon & Leucon! And, intracellular is the digestion !
Ostia, incurrent & radial canals, also, many a proso & apopyle !
For the larva ( of Demospongiae) , it’s Rhagon, for a while !
Out of the whole, the osculum’s (ake the excurrent canal) the sole exit !
Reproduction’s by fragmentation, budding or gemmules ~ as they see fit !
Free swimming baby amphiblastulas for Sycon, if you remember correct !
Parenchymula for Leucosolenia & the others ; development’s indirect !
Calcispongiae with mono, tri & tetra axon spicules !
Hexactinellida & Demospongiae with choanocytes miniscule !
Calcispongiae in the shallow, Hexactinellida in the deep !
Hexactinellida’s Euplectella into marriages does creep !
Demospongiae with sponging fibres (or siliceous spicules) to scrub !
Cliona in molluscs’ shells & Euspongia & Spongilla in your bath-tub !
Calcispongiae with its Leucosolenia & Sycon
Demospongiae with only Mono or Tetra Axon !
About Hyalonema & archaeocytes, we can go on & on !
Now, to the next Phylum ! Let’s be gone !!
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