BIS2C_Lect26_Ward_Development___Sponges_ppt

Complex network of collagen but no spicules these

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: of collagen) but no spicules: these have long been harvested for use as bath sponges Largely replaced by synthetic sponges and luffa. Largely replaced by synthetic sponges and luffa. Luffa aegyptiaca Some sponges live in freshwater environments, mostly marine Sponge features: biology • All aquatic, mostly marine • ~8000 species (7000 species of demosponges) • Adults sessile, larvae motile • Mostly filter feeders on microscopic particles (bacteria, organic detritus, etc.), captured on microvilli, digested intracellularly Adults cannot move, larvae are mobile Mostly filter feeders, captured on microvilli, digested intracellularly by phagocytosis Sponge features: biology Sponge features: biology • All aquatic, mostly marine • ~8000 species (7000 species of demosponges) • Adults sessile, larvae motile • Mostly filter feeders on microscopic particles (bacteria, organic detritus, etc.), captured on microvilli, digested intracellularly intracellularly Sexual reproduction Reproduction Sperm released into the environment en masse through the aquiferous system (“smoking sponges”); then enter neighboring egg-containing spo...
View Full Document

Ask a homework question - tutors are online