Do insects breath,if so does that mean they have little lungs?

Answer 1

Isects use "Invertebrate Trachea" to breath.
You can get information and a photo here:

http://images.google.co.uk/imgres?imgurl=http://www.lung.ca/children/images/compare/insect-trachea.jpg&imgrefurl=http://www.lung.ca/children/grades4_6/respiratory/insects.html&h=150&w=226&sz=4&hl=en&start=2&tbnid=B1q67PSrornopM:&tbnh=72&tbnw=108&prev=/images%3Fq%3DTrachea%2Binsect%26svnum%3D10%26hl%3Den%26lr%3D%26rls%3DSUNA,SUNA:2005-40,SUNA:en

More information:

Many terrestrial arthropods have evolved a closed respiratory system composed of spiracles, tracheae, and tracheoles to transport metabolic gasses to and from tissue. Some terrestrial woodlice have evolved pseudotrachea, a system which is also called corpus alatum, and is made up of air tubes that delivers oxygen to their hemolymph; a similar system has been found in some caterpillars. The distribution of spiracles can vary greatly among the many orders of insects, but in general each segment of the body can have no more than one pair of spiracles, each of which connects to an atrium and has a relatively large tracheal tube behind it. The tracheae are invaginations of the cuticular exoskeleton that branch (anastomose) throughout the body with diameters from only a few micrometers up to 0.8mm. The smallest tubes, tracheoles, penetrate cells and serve as sites of diffusion for water, oxygen, and carbon dioxide. Gas may be conducted through the respiratory system by means of active ventilation or passive diffusion. Unlike vertebrates, insects do not generally carry oxygen in their hemolymph; this is one of the factors that may limit their size.

A tracheal tube may contain ridge-like circumferential rings of taenidia in various geometries such as loops or helices.

In the head, thorax, or abdomen, tracheae may also be connected to air sacs. Many insects, such as grasshoppers and bees, which actively pump the air sacs in their abdomen, are able to control the flow of air through their body. In some aquatic insects, the tracheae exchange gas through the body wall directly, in the form of a gill. Note that despite being internal, the tracheae of arthropods are shed during moulting (ecdysis).

Another good photo here:

http://www.ou.edu/class/invert/spiracle.htm

Answer 2

Insects respire by means of an elaborate and efficient gas exchange system
made of branching elastic tubes called tracheae...the whole system is called
the tracheal system.It serves for the transport of oxygen aand carbon dioxide.
As air is brought in direct contact with tissues and cells, gas exchange
is through diffusion. In aquatic insects, there are many other specialisations.

Now about respiration in amoeba:
As you may know, the amoeba has no special respiratory organs and no
respiratory pigments, but there is a free exchange of gases by diffusion
or osmosis through the general body surface (plasmalemma), which is
permeable to the gases dissolved in water.

Answer 3

Insects have dead end tubes in their bodies called malphigian (sp?) tubules as the insect moves, it draws in and pushes out enough air for them to absorb O2 and release CO2.

Answer 4

In insects the respiration take place with the help of tubes called trachea, so it is called tracheal respiration.

Answer 5

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