The appendix has long been considered a vestigial structure. That is, a deconstructed, nonfunctional characteristic that has been fully functional in a species' ancestor.(Mayr, 291) Humans seem to have a fair number of other vestigial organs such as male nipples, wisdom teeth, tailbones (coccyx), and ear muscles.
If you don't have a RealPlayer Plug-in, Get it here for free! Uzi is a SMG (small machine gun) chambered for either the 9 X 19 (9mm Parabellum) or .45 ACP round. Uzis are widely available for civilian purchase in a semi-auto version. Several different countries have licensed the Uzi design from IMI in Israel. These countries include China (Norinco), Belgium (FN), U.S.A. (Group Industries), Cuba, and France.
Explanation. Piezo injectors use piezoelectric technology to open and close fuel injectors at extremely high speeds and precision to inject fuel into an internal combustion engine. These injectors are used in both petrol and diesel engines to improve their persformance and efficiency.iezo injectors have the ability to inject fuel into the cylinder several times in one stroke (as many as seven times). This is very useful in a diesel engine where a spark is not used to ignite the fuel. Multiple injections allow a pre, main and post explosion and ensures no fuel is wasted.