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Arthropods (phylum Arthropoda) (from Greek ἀρθρον, meaning joint and πούς/ποδός, meaning foot) are the largest phylum of animals and include the insects, arachnids, crustaceans, and others. Approximately eighty percent of extant animal species are arthropods, with over a million modern species described and a fossil record reaching back to the early Cambrian. Arthropods are common throughout marine, freshwater, terrestrial, and even aerial environments, as well as including various symbiotic and parasitic forms. They range in size from microscopic plankton (~0.25 mm) up to forms several metres long.
Arthropods are characterised by the possession of a segmented body with appendages on each segment. They have a dorsal heart and a ventral nervous system. All arthropods are covered by a hard exoskeleton that is made out of chitin, a polysaccharide. Periodically, an arthropod sheds this covering when it moults. This covering makes arthropods less prone to dehydration.
Basic arthropod structure
More on [ Arthropod ]
Arthropods :: Bites and Stings
Arthropods :: Invertebrates
Pests and Diseases :: Agriculture
Arthropoda :: Animalia
Arthropods :: Biology
Ellie keeps finding "Arthropoda" at her preschool beach craft time. She's making homeschooling look amazing! http://twitpic.com/qnfdk
KarenDawkins (Karen Dawkins) Mon, 23 Nov 2009 17:35:26 -0000
Ellie keeps finding "Arthropoda" at her preschool beach craft time. She's making homeschooling look amazing! http://twitpic.com/qnfdk
Geleedpotigen, Arthropoda http://tinyurl.com/yevdb42
GEOlution (GEOlution) Sat, 21 Nov 2009 19:42:33 -0000
Geleedpotigen, Arthropoda http://tinyurl.com/yevdb42
@sanymoraes X-Salmonela no MP, X-Arthropoda insecta no TST, X-morte lenta na rodoviária e X-Safena no Skys... hahhaha
esguimaraes (Edvaldo S G Junior) Fri, 20 Nov 2009 01:41:45 -0000
@sanymoraes X-Salmonela no MP, X-Arthropoda insecta no TST, X-morte lenta na rodoviária e X-Safena no Skys... hahhaha
Global Litter Invertebrate Decomposition Experiment - Assesses rates of decomposition while controlling climatic factors across latitudes and biomes.
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Invertebrate Anatomy - Library of anatomical descriptions and dissection guides by Richard Fox of Lander University, South Carolina.
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Project ALAS - Arthropods of La Selva - Large scale inventory of arthropod diversity in the lowland tropical rainforest of La Selva, Ecuador.
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Scientific Reference Resources - Publishes monthly catalogs of literature including, not limited to, the Arthropod Endocrinology News.
Meta Description: [ Scientific Reference Resources (SRR) publishes Arthropod Endocrinology News, the Directory of Arthropod Endocrinologists, and New Entomological Taxa. ]
Sonoran Arthropod Studies Institute - Researches insects, arachnids and other arthropods that affect the Sonoran ecosystem. Located in Tucson, Arizona.
Meta Description: [ SASI's website provides an overview of the non-profit organization's mission and programs. Visitors can join SASI and purchase books and other items in the Many Legs Trading Post with secure transactions. The site's Education Center includes a number of sections in which to explore butterflies,... ]
Urban Entomology - Online book written by Walter Ebeling that discusses arthropod pests in the urban environment and in the home.
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