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en.wikipedia.org/wiki/Exoskeleton

An exoskeleton is the external skeleton that supports and protects an animal's body, in contrast to the internal skeleton (endoskeleton) of, for example, a human. In usage, some of the larger kinds of exoskeletons are known as "shells". Examples of animals with exoskeletons include insects such as ...

en.wikipedia.org/wiki/Skeleton

The skeleton is the body part that forms the supporting structure of an organism. There are several different skeletal types: the ...

www.answers.com/Q/Organisms_with_external_skeletons_are_exemplified_by

Skeletons: All animals, including humans have skeletons. Humans have an internal skeleton. This means that our bones is on the inside of us. When an animal ...

www.reference.com/science/external-skeleton-bc30a58d53cb3416

An external skeleton, commonly referred to as an exoskeleton, is an external covering that supports and protects the body of an animal. Many animals, including ...

www.britannica.com/science/muscle/Muscle-in-soft-animals

Slugs, worms, and many other invertebrate animals have no skeleton, and thus ... the cylindrical tentacled polyp, exemplified by the hydra and the sea anemone, ...

www2.estrellamountain.edu/faculty/farabee/biobk/BioBookDiversity_9.html

Coelomates are animals that have internal body cavities, or coeloms. ... Coelomates also form a variety of internal and external skeletons. ... Deuterostomes (as exemplified by the echinoderms and chordates) develop the anus first, then the ...

www.nature.com/news/2000/000530/full/news000601-3.html

May 30, 2000 ... Several microscopic marine organisms make themselves shells -- strictly speaking, external skeletons (exoskeletons) that enclose their soft bodies. ... Another common patterning method in nature is exemplified by the stripes ...

s10.lite.msu.edu/res/msu/botonl/b_online/library/onlinebio/BioBookDiversity_9.html

Coelomates also form a variety of internal and external skeletons. ... Deuterostomes (as exemplified by the echinoderms and chordates) develop the anus first, ...

www.aqa.org.uk/subjects/science/as-and-a-level/biology-7401-7402/subject-content/organisms-respond-to-changes-in-their-internal-and-external-environments-a-level-only

3.6 Organisms respond to changes in their internal and external environments ... The protective effect of a simple reflex, exemplified by a three-neurone simple reflex. ... Muscles act in antagonistic pairs against an incompressible skeleton.