Friday, 31 December 2010
insect pictures
Insects (from Latin insectum, a calque of Greek ἔντομον [éntomon], “cut into sections”) are a class within the arthropods that have a chitinous exoskeleton, a three-part body (head, thorax, and abdomen), three pairs of jointed legs, compound eyes, and two antennae. They are among the most diverse group of animals on the planet and include more than a million described species and represent more than half of all known living organisms.[2][3] The number of extant species is estimated at between six and ten million,[2][4][5] and potentially represent over 90% of the differing metazoan life forms on Earth.[6] Insects may be found in nearly all environments, although only a small number of species occur in the oceans, a habitat dominated by another arthropod group, the crustaceans.
The life cycles of insects vary but most hatch from eggs. Insect growth is constrained by the inelastic exoskeleton and development involves a series of molts. The immature stages can differ from the adults in structure, habit and habitat and can include a passive pupal stage in those groups that undergo complete metamorphosis. Insects that undergo incomplete metamorphosis lack a pupal stage and adults develop through a series of nymphal stages.[7] The higher level relationship of the hexapoda is unclear. Fossilized insects of enormous size have been found from the Paleozoic Era, including giant dragonflies with wingspans of 55 to 70 cm (22–28 in). The most diverse insect groups appear to have coevolved with flowering plants.
Insects typically move about by walking, flying or occasionally sinking and swimming at the same time. Because it allows for rapid yet stable movement, many insects adopt a tripedal gait in which they walk with their legs touching the ground in alternating triangles. Insects are the only invertebrates to have evolved flight. Many insects spend at least part of their life underwater, with larval adaptations that include gills and some adult insects are aquatic and have adaptations for swimming. Some species, like water striders, are capable of walking on the surface of water.
Insects are mostly solitary, but some insects, such as certain bees, ants, and termites are social and live in large, well-organized colonies. Some insects, like earwigs, show maternal care, guarding their eggs and young. Insects can communicate with each other in a variety of ways. Male moths can sense the pheromones of female moths over distances of many kilometers. Other species communicate with sounds: crickets stridulate, or rub their wings together, to attract a mate and repel other males. Lampyridae in the beetle order Coleoptera communicate with light.
Humans regard certain insects as pests and attempt to control them using insecticides and a host of other techniques. Some insects damage crops by feeding on sap, leaves or fruits, a few bite humans and livestock, alive and dead, to feed on blood and some are capable of transmitting diseases to humans, pets and livestock. Many other insects are considered ecologically beneficial and a few provide direct economic benefit. Silkworms and bees have been domesticated by humans for the production of silk and honey, respectively.
General body plan
Insects have segmented bodies supported by an exoskeleton, a hard outer covering made mostly of chitin. The segments of the body are organized into three distinctive but interconnected units, or tagmata: a head, a thorax, and an abdomen.[8] The head supports a pair of sensory antennae, a pair of compound eyes, and, if present, one to three simple eyes (or ocelli) and three sets of variously modified appendages that form the mouthparts. The thorax has six segmented legs—one pair each for the prothorax, mesothorax and the metathorax segments making up the thorax—and, if present in the species, two or four wings. The abdomen consists of eleven segments, though in a few species of insects these segments may be fused together or reduced in size. The abdomen also contains most of the digestive, respiratory, excretory and reproductive internal structures.[9]:22–48 There is considerable variation and many adaptations in the body parts of insects especially wings, legs, antenna, mouth-parts etc.
[edit] Exoskeleton
Insect outer skeleton, the cuticle, is made up of two layers: the epicuticle, which is a thin and waxy water resistant outer layer and contains no chitin, and a lower layer called the procuticle. The procuticle is chitinous and much thicker than the epicuticle and has two layers: an outer layer known as the exocuticle and an inner layer known as the endocuticle. The tough and flexible endocuticle is built from numerous layers of fibrous chitin and proteins, criss-crossing each others in a sandwich pattern, while the exocuticle is rigid and hardened.[9]:22–24 The exocuticle is greatly reduced in many soft-bodied insects (e.g., caterpillars), especially during their larval stages.
Insects are the only invertebrates to have developed active flight capability, and this has played an important role in their success.[9]:186 These muscles are able to contract multiple times for each single nerve impulse, allowing the wings to beat faster than would ordinarily be possible. Having their muscles attached to their exoskeletons is more efficient and allows more muscle connections; crustaceans also use the same method, though all spiders use hydraulic pressure to extend their legs, a system inherited from their pre-arthropod ancestors. Unlike insects, though, most aquatic crustaceans are biomineralized with calcium carbonate extracted from the water.[10][11]
[edit] Nervous system
The nervous system of an insect can be divided into a brain and a ventral nerve cord. The head capsule, made up of six fused segments, each with a pair of ganglia, or a cluster of nerve cells outside of the brain. The first three pairs of ganglia are fused into the brain, while the three following pairs are fused into a structure of three pairs of ganglia under the insect's esophagus, called the subesophageal ganglion.[9]:57
The life cycles of insects vary but most hatch from eggs. Insect growth is constrained by the inelastic exoskeleton and development involves a series of molts. The immature stages can differ from the adults in structure, habit and habitat and can include a passive pupal stage in those groups that undergo complete metamorphosis. Insects that undergo incomplete metamorphosis lack a pupal stage and adults develop through a series of nymphal stages.[7] The higher level relationship of the hexapoda is unclear. Fossilized insects of enormous size have been found from the Paleozoic Era, including giant dragonflies with wingspans of 55 to 70 cm (22–28 in). The most diverse insect groups appear to have coevolved with flowering plants.
Insects typically move about by walking, flying or occasionally sinking and swimming at the same time. Because it allows for rapid yet stable movement, many insects adopt a tripedal gait in which they walk with their legs touching the ground in alternating triangles. Insects are the only invertebrates to have evolved flight. Many insects spend at least part of their life underwater, with larval adaptations that include gills and some adult insects are aquatic and have adaptations for swimming. Some species, like water striders, are capable of walking on the surface of water.
Insects are mostly solitary, but some insects, such as certain bees, ants, and termites are social and live in large, well-organized colonies. Some insects, like earwigs, show maternal care, guarding their eggs and young. Insects can communicate with each other in a variety of ways. Male moths can sense the pheromones of female moths over distances of many kilometers. Other species communicate with sounds: crickets stridulate, or rub their wings together, to attract a mate and repel other males. Lampyridae in the beetle order Coleoptera communicate with light.
Humans regard certain insects as pests and attempt to control them using insecticides and a host of other techniques. Some insects damage crops by feeding on sap, leaves or fruits, a few bite humans and livestock, alive and dead, to feed on blood and some are capable of transmitting diseases to humans, pets and livestock. Many other insects are considered ecologically beneficial and a few provide direct economic benefit. Silkworms and bees have been domesticated by humans for the production of silk and honey, respectively.
General body planInsects have segmented bodies supported by an exoskeleton, a hard outer covering made mostly of chitin. The segments of the body are organized into three distinctive but interconnected units, or tagmata: a head, a thorax, and an abdomen.[8] The head supports a pair of sensory antennae, a pair of compound eyes, and, if present, one to three simple eyes (or ocelli) and three sets of variously modified appendages that form the mouthparts. The thorax has six segmented legs—one pair each for the prothorax, mesothorax and the metathorax segments making up the thorax—and, if present in the species, two or four wings. The abdomen consists of eleven segments, though in a few species of insects these segments may be fused together or reduced in size. The abdomen also contains most of the digestive, respiratory, excretory and reproductive internal structures.[9]:22–48 There is considerable variation and many adaptations in the body parts of insects especially wings, legs, antenna, mouth-parts etc.
[edit] Exoskeleton
Insect outer skeleton, the cuticle, is made up of two layers: the epicuticle, which is a thin and waxy water resistant outer layer and contains no chitin, and a lower layer called the procuticle. The procuticle is chitinous and much thicker than the epicuticle and has two layers: an outer layer known as the exocuticle and an inner layer known as the endocuticle. The tough and flexible endocuticle is built from numerous layers of fibrous chitin and proteins, criss-crossing each others in a sandwich pattern, while the exocuticle is rigid and hardened.[9]:22–24 The exocuticle is greatly reduced in many soft-bodied insects (e.g., caterpillars), especially during their larval stages.
Insects are the only invertebrates to have developed active flight capability, and this has played an important role in their success.[9]:186 These muscles are able to contract multiple times for each single nerve impulse, allowing the wings to beat faster than would ordinarily be possible. Having their muscles attached to their exoskeletons is more efficient and allows more muscle connections; crustaceans also use the same method, though all spiders use hydraulic pressure to extend their legs, a system inherited from their pre-arthropod ancestors. Unlike insects, though, most aquatic crustaceans are biomineralized with calcium carbonate extracted from the water.[10][11]
[edit] Nervous system
The nervous system of an insect can be divided into a brain and a ventral nerve cord. The head capsule, made up of six fused segments, each with a pair of ganglia, or a cluster of nerve cells outside of the brain. The first three pairs of ganglia are fused into the brain, while the three following pairs are fused into a structure of three pairs of ganglia under the insect's esophagus, called the subesophageal ganglion.[9]:57
Toyota Corolla Rumion
Toyota Corolla Rumion
Toyota Corolla Rumion Gallery . . . .
Red Toyota Corolla Rumion
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BMW 3 Series
The BMW E90 series is the fifth generation of the BMW 3 Series range of compact executive cars. The car is also available as a touring (designated as E91), coupé (E92) and coupé cabriolet (E93). A high performance BMW M3 version of the E90, E92, and E93 is also available. It is the successor to the E46 model, and was launched in March 2005. The E90 is slated to be replaced in 2012 when a new 3 Series body is introduced.In 2002, Head of Production Norbert Reithofer and Development Chief Burkhard Goeschel started an initiative to halve the time it took to reach full production of the next generation 3-series from six months to three.
First marketed in March 2005, the car quickly became BMW Group's best selling automobile worldwide, and by the end of the year 229,900 vehicles had been delivered. It is by far the best-selling entry-level luxury car in Canada and the United States.
BMW 3 Series Fast Cars
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BMW 3 Series Exterior
Thursday, 30 December 2010
Acura MDX
Elegant Black Acura MDX
Silver Acura MDX on the Road
Black Acura MDX Looking Great
Acura MDX on the Snow
Acura MDX Exterior
Acura MDX Black from Left Side
Black Acura MDX Concept
Acura MDX Parking
Audi TT
Audi TT car review - Top Gear - BBC
The Audi TT is a two-door sports car manufactured by Audi Hungaria Motor Kft. in Győr, Hungary, since 1998, for the German automaker and Volkswagen Group subsidiary AUDI AG.The Audi TT is now in its second generation — and both generations have been available in two car body styles; as a 2+2 Coupé, or two-seater Roadster. They have been built on consecutive generations of the Volkswagen Group A platform, starting with the A4 (PQ34). As a result of this platform-sharing, the Audi TT has identical powertrain and suspension layouts as its related platform-mates; this includes a front-mounted transversely oriented engine, front-wheel drive or quattro permanent four-wheel drive system, and fully independent front suspension using MacPherson struts.
The styling of the Audi TT began in the spring of 1994 at the Volkswagen Group Design Center in California.The TT was first shown as a concept car at the 1995 Frankfurt Motor Show.The design is credited to J Mays and Freeman Thomas,with Hartmut Warkuss, Peter Schreyer,Martin Smithand Romulus Rost contributing to the award-winning interior design.A previously unused laser beam welding adaptation, which enabled seamless design features on the first-generation TT, delayed its introduction. Audi did not initially offer any type of automatic transmission option for the TT. However, from 2003, a dual clutch six-speed Direct-Shift Gearbox (DSG) became available, with the United Kingdom TT variants becoming the world's first user of a dual clutch transmission configured for a right-hand drive vehicle, although the outright world first for a road car equipped with a dual clutch transmission was claimed earlier by a Volkswagen Group platform-mate, the left hand drive Volkswagen Golf Mk4 R32.The Audi TT takes its name from the successful motor racing tradition of NSU in the British Isle of Man TT (Tourist Trophy) motorcycle race. NSU began competing in the TT in 1911, and later merged into the company now known as Audi.The Audi TT also follows the NSU 1000TT, 1200TT and TTS cars of the 1960s in taking their names from the race. The TT name has also been attributed to the phrase "Technology & Tradition"
Audi TT Fast Car
White Audi TT Concept
Astrum Meera Concept Cars With Magnetic Levitation
Astrum Meera Concept Cars With Magnetic Levitation
Astrum Meera Concept Cars With Magnetic Levitation
Astrum Meera Concept Cars With Magnetic Levitation
Astrum Meera Concept Cars With Magnetic Levitation
Astrum Meera Concept Cars With Magnetic Levitation
Nicole Scherzinger Hot Wallpapers Latest Sexy Actress Singer Twitter Backgrounds
Nicole Scherzinger Hot Wallpapers Latest Sexy Actress Singer Twitter Backgrounds. Nicole Scherzinger no longer wants to hear the Pussycat Dolls songs that sent her to stardom. Download Nicole Scherzinger Hot Desktop Backgrounds,Photos in HD and High Quality Resolutions. Hot Hollywood Celebrity Sexy and Spicy wallpapers.
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Ford Mustang cool Modification
Cool Ford mustang picture
Ford Mustang auto tune
Mustang Freestyle
The Ford Mustang Shelby is a high performance variant of the Ford Mustang, built by Ford from 1968 through 1970. The 1965, 1966 and 1967 Shelbys' were a series of Ford Mustangs which were specially modified by Carroll Shelby's company and sold under the name Shelby GT with identification badges Shelby Cobra. From 1968 the model became the Shelby Cobra GT. The program was factory-sponsored by Ford to compete with the Corvette, also factory-sponsored by Chevrolet, neither of which could be built for the sales price charged. In 2007, following the introduction of the Fifth-generation Ford Mustang the Shelby nameplate was revived for new high performance versions of the Mustang.
Ford Mustang cool Modification
Cool Ford mustang picture
Ford Mustang auto tune
Mustang Freestyle
The Ford Mustang Shelby is a high performance variant of the Ford Mustang, built by Ford from 1968 through 1970. The 1965, 1966 and 1967 Shelbys' were a series of Ford Mustangs which were specially modified by Carroll Shelby's company and sold under the name Shelby GT with identification badges Shelby Cobra. From 1968 the model became the Shelby Cobra GT. The program was factory-sponsored by Ford to compete with the Corvette, also factory-sponsored by Chevrolet, neither of which could be built for the sales price charged. In 2007, following the introduction of the Fifth-generation Ford Mustang the Shelby nameplate was revived for new high performance versions of the Mustang.
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