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Sponge
Sponges do not have nervous, digestive or circulatory systems. ... A few species of sponge that live in food-poor environments have become carnivores that prey ... Cnidarians and ctenophores have si... |
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Chapter 42 - Circulation and Gas Exchange | Course-Notes.Org
Most invertebrates have a gastrovascular cavity or a circulatory system for ... There is no distinction between blood and interstitial fluid, collectively called hemolymph. ... . to the body's organs is critical for survival, several mechanisms have evolved ... .. Similarly, for some relatively simple animals, such as sponges, cnidar... |
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General Biology/Classification of Living Things/Eukaryotes/Animals ...
1 Introduction to animal phyla; 2 Phylum Porifera; 3 Phylum Cnidaria; 4 Phylum ... Many organisms are commensals of sponges, living inside them. ... Cnidarianshave no head, no centralized nervous system, and no ... Flatworms have NOcirculatory or gas exchange systems. They do ... They can live pretty much anywhere. |
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About Sponges - Tree of Life Web Project
They have partially differentiated tissues, and not true tissues. Sponges don't have internal organs. They don't have muscles, a nervous system, or a circulatorysystem. ... 99% of all sponges live in marine water, but some sponges made of spongin fiber live ... . Bilateria · Myxozoa · Cnidaria · Ctenophora ·... |
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Introduction to Animals, Sponges, Cnidarians
Sponges, Cnidarians ... and adults have different forms, they often eat different food and may live in different ... Asymmetrical animals have no pattern of symmetry. ... Fluid within the body cavity can act like a circulatory system and distribute ... |
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invertebrate notes - Biology Junction
Invertebrates are animals which do not have a backbone. ... Sponges are asymmetrical and live attached to one spot as adults making them sessile animals. ... Cnidarians have radial symmetry and are carnivorous using tentacles that surround ... . system except for octopus & squids which have a closed circulatory system. |