Difference between revisions of "Invertebrate"
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| − | An '''invertebrate''' (in contrast to a [[vertebrate]]), is an [[animal]] with no [[spine]]. | + | An '''invertebrate''' (in contrast to a [[vertebrate]]), is an [[animal]] with no [[spine]].<ref>Wile, Dr. Jay L. ''Exploring Creation With Biology''. Apologia Educational Ministries, Inc. 1998</ref> |
| − | [[ | + | Most living animals are invertebrates, including [[arthropod]]s, [[mollusc]]s, and [[annelids]]. |
The phyla contained in Invertebrata are: | The phyla contained in Invertebrata are: | ||
*[[Protozoan|Protozoa]] - Mostly simple, single-celled organisms | *[[Protozoan|Protozoa]] - Mostly simple, single-celled organisms | ||
| − | *[[Porifera]] - [[ | + | *[[Porifera]] - [[Sponge]]s |
| − | *[[ | + | *[[Coelenterata]] - Hydra, [[jellyfish]], [[sea anemone|anemones]] and [[coral]]s |
*[[echinoderms|Echinoderm]]a - [[Starfish]], [[sea urchin]]s and [[sea cucumber]]s | *[[echinoderms|Echinoderm]]a - [[Starfish]], [[sea urchin]]s and [[sea cucumber]]s | ||
*[[Annelid]]a - [[Worm]]s | *[[Annelid]]a - [[Worm]]s | ||
Latest revision as of 01:05, July 2, 2010
An invertebrate (in contrast to a vertebrate), is an animal with no spine.[1]
Most living animals are invertebrates, including arthropods, molluscs, and annelids.
The phyla contained in Invertebrata are:
- Protozoa - Mostly simple, single-celled organisms
- Porifera - Sponges
- Coelenterata - Hydra, jellyfish, anemones and corals
- Echinoderma - Starfish, sea urchins and sea cucumbers
- Annelida - Worms
- Brachiopoda - Bivalves, such as mussels and clams
- Polyzoa - Single celled critters that usually form colonies
- Mullusca - Whelks, ammonites, cuttlefish, squids, snails, etc.
- Arthropoda - Crustaceans, insects, arachnids, trilobites, etc.[2]