• Sponges - Porifera - The Animal Encyclopedia

      animals.about.com/od/sponge1/p/porifera.htm Sponges are a group of simple aquatic invertebrates that include glass sponges, demisponges, and calcareous sponges.
    • Sponges - EnchantedLearning.com

      www.enchantedlearning.com/subjects/invertebrates/sponge Sponges (poriferans) are very simple animals that live permanently attached to a location in the water - they are sessile as adults. There are from 5,000 to 10,000 ...
    • Amazon.com: sponges

      www.amazon.com/s Product Features Built with durable material and lasts 20% longer than regular scrubbing sponges
    • The Wonders of the Seas: Sponges - Oceanic Research Group

      www.oceanicresearch.org/education/wonders/sponges.html Although they may look plant-like, sponges are the simplest of multi-cellular animals. A sponge is a bottom-dwelling creature which attaches itself to something solid ...
    • Introduction to Porifera

      www.ucmp.berkeley.edu/porifera/porifera.html Poriferans are commonly referred to as sponges. An early branching event in the history of animals separated the sponges from other metazoans.
    • About Sponges

      www.tolweb.org/treehouses What are Sponges Made of? Sponges are made of four simple and independent cells. The first are the collar cells, which line the canals in the interior of the sponge.
    • Sponge - Simple English Wikipedia, the free encyclopedia

      simple.wikipedia.org/wiki/Sponge Sponges Cnidarians and ctenophores; Nervous system: No: Yes, simple: Cells in layer bound together: No, except that Homoscleromorpha have basement membranes.