Dictionary » T » Thorax



1. (Science: anatomy) The part of the trunk between the neck and the abdomen, containing that part of the body cavity the walls of which are supported by the dorsal vertebrae, the ribs, and the sternum, and which the heart and lungs are situated; the chest.

In mammals the thoracic cavity is completely separated from the abdominal by the diaphragm, but in birds and many reptiles the separation is incomplete, while in other reptiles, and in amphibians and fishes, there is no marked separation and no true thorax.

2. (Science: zoology) The middle region of the body of an insect, or that region which bears the legs and wings. It is composed of three united somites, each of which is composed of several distinct parts.The second, or middle, region of the body of a crustacean, arachnid, or other articulate animal. In the case of decapod crustacea, some writers include under the term thorax only the three segments bearing the maxillipeds; others include also the five segments bearing the legs.

3. A breastplate, cuirass, or corselet; especially, the breastplate worn by the ancient greeks.

Origin: L, fr. Gr.

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Re: ID on this bug?

My first impression was a cockroach, but when I searched for other images, the front legs look too robust, and the head is too fused with the thorax. Maybe it's a cockroach adapted for burrowing. Or something else.

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by wbla3335
Sat Mar 24, 2012 11:57 pm
Forum: Zoology Discussion
Topic: ID on this bug?
Replies: 5
Views: 2775

Question about flies.

During flight, the insect thorax has a temperature a lot higher than that of the other body parts. This high temperature is required to be maintained for the purpose of flight. If you suddenly decrease the temperature, I suspect its wings ...

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by Adz795
Sun Aug 07, 2011 6:12 am
Forum: Zoology Discussion
Topic: Question about flies.
Replies: 2
Views: 6399

Re: which insect is this

... later on,but there are 130 000 different types of it :S it's the most similar to sawfly but it has a different connection between its abdomen and thorax

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by nevevevena
Sun Apr 25, 2010 7:48 pm
Forum: Zoology Discussion
Topic: which insect is this
Replies: 6
Views: 3828

Why do you keep talking about species

... 150 Loricifera Corset bearer Brush heads Umbrella-like scales at each end about 122 Micrognathozoa Tiny jaw animals — Accordion like extensible thorax 1 Mollusca Thin shell Mollusks / molluscs Muscular foot and mantle round shell 112,000[9] Nematoda Thread like Round worms Round cross section, ...

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by gamila
Mon Jun 29, 2009 5:35 pm
Forum: Evolution
Topic: Why do you keep talking about species
Replies: 23
Views: 54310

Organ systems

For question one, you could include digestive (if esophagus in thorax is enough) and immune system (thymus and spleen). I'm not sure I'd include the nervous system, since there are no organs or structures beyond just nerves in the cavities - but by your ...

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by Darby
Tue Sep 09, 2008 6:22 pm
Forum: Human Biology
Topic: Organ systems
Replies: 4
Views: 18386
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