Invertebrates 1. Constitute a body made up of many links, general separately, chest, abdomen part of the outer surface of the chitin skeleton protect internal organs, there are pairs and sub-section legs. Many types, such as centipedes, spiders, bees, butterflies, shrimp and crabs.
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No. 2
Arthropods (millipede) Arthropoda (arthropoda) range from deep sea to the mountains are distributed, and some even appeared to fly with wings, is the only true invertebrate animals adapt to life on land. Currently more than 1.2 million kinds of arthropods known, about the total number of animals known to 84%. More common in a variety of shrimp, crabs and other aquatic arthropods, there are spiders, centipedes, insects and other terrestrial species. Arthropods is an elongated, flat, section by section, to carrion-eating animals, some have two feet each. Australia hope to stay in the evolution century, about one million known species still alive today. Arthropods and the centipede is the more well-known enough to outline arthropod species. Arthropods (arthropod) A section of limb and shell invertebrates, their shell will be changed, although the growth process off. Are three main types of centipedes, millipedes, insects, spiders?? Sub-categories and crustaceans. The ancestors of these three species have been developed in the Cambrian period of the whole building. Arthropods (arthropoda) is the largest one the animal kingdom, is also the most dynamic range of goods, accounting for all animal species eighty-five%. Adaptation to the environment particularly strong, to survive places, including sea water, fresh water, mountain, air , soil, and even animals and plants in vivo and in vitro. Classification of living arthropods, in addition to the extinct animal sub-clover outside the traditional reach and on the basis of whether the sub-divided into two doors. No antenna is called a chelating Amon animals, because the first one is to take the corresponding appendage after eating crayfish limb is named, including horseshoe crabs, scorpions, spiders, ticks and mites, etc.; have antennae called a jaw animal sub-gate, its 1 counterparts after the big jaw appendages, including Insecta, crustaceans, centipedes and millipedes and so on. But now most zoologists believe that animals have jaws Amon is a combination of man-made, included no genetic relationship between the groups. Therefore, the Arthropoda should be divided into four sub-gate: the extinct animal sub-clover door, the existing animal subphylum limb claws, crustaceans and single-branch animal subphylum subphylum. Amon clover animals showed the most primitive features, are living in the ocean. In addition to reach, the rest of the body sections are two-branch type appendages. Crayfish limb limb animal population sub-headings and the door Arachnida head appendages. Book gills and book lungs as homologous, indicating Outlines closer. Over the past crustacean subphylum Crustacea as a key link that is due to a large jaw and is thought to be more than enough with the classes, Insecta origin, but the crustaceans with two pairs of antennae and there is no other doors in the nauplius stage, should be a separate origin. Single branch and the origin of animals Amon Amon different in the ocean, it seems that evolved from the land, with antennae and big jaw, limb essentially as a single branch type, hence the name. Arthropoda 4 sub-door 19 classes are as follows: Clover animals Amon (subphylum trilobitomorpha) Trilobite Programme (trilobita) Crayfish limb animal subphylum (subphylum chelicerata) Limb mouth Gang (merostomata) Arachnida (arachnida) Sea Spider Gang (pycnogonida) Crustacean subphylum (subphylurm crustaceea) Head shrimp Programme (cephalocarida) Gill Foot Gang (branchiopoda) Paddle Foot Gang (remipedia) Ostracoda Programme (ostracoda) Programme to be shrimp (mystacocarida) Micro shrimp Programme (tantulocarida) Copepods Gang (copepoda) Gill Last Gang (branchiura) Foot Man Gang (cirripedia) Soft-Gang (malacostraca) Single-branch animal subphylum (subphylum uniramia) Insecta (insecta) Millipedes Programme (diplopoda) Chilopoda (chilopoda) Candle butterfly Gang (pauropoda) Integrated Programme (symphyla)
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Introduction
The largest category the animal kingdom, Arthropoda (Arthropoda) of the animals referred to, including over one million kinds of invertebrates, account for almost all animal species in 84%. Members of the diverse. Bilaterally symmetrical invertebrates, covered in part by the in vitro chitin composed of epidermis, to regularly fall off, skin is a protection device, since the role of the exoskeleton, the muscle to provide attachment surface. Muscle complex procedures, some specialized to manipulate the flight and voice. Exoskeleton appendages with joints, thus called arthropods. There are many special sensory; degradation of the body cavity and replace the blood chamber; nervous system from the back of the brain and a pair of ventral nerve cord composition. Account has more than 879,000, of which about 86% are insects. It is estimated that a total of more than 1,000 million. Divided into four sub-door ︰
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Features
Arthropoda main features: (A) of the exoskeleton developed Jianhou (B) efficient respiratory organs - trachea (C) well-developed nervous system (D) different law section and the body segment (E) section of the appendages (Vi) sensory organ sensitive (Vii) In vitro chitin and bone protein
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Categories
1 Amon trilobites (Trilobita):): clover insects (Trilobites), about 5.7 million years ago in the early Paleozoic ocean dominant in the Permian extinction 280 million years ago; body ovoid dorsoventral flat, separately, chest and tail sections of three parts; vertical into clover. 3.5 ~ 75 cm long. 2 single-limb Amon (Uniramia): head tentacles, big palate and small jaw. Thoracic appendages of one limb or two limbs. Regardless of the abdomen and chest and some, with appendages; or chest apart, with or without appendages. (1) candle Programme (Pauropoda): small multi-footed. Mouthparts into two pairs of appendages, 8 ~ 11 on pereiopod. Antennae four (rarely six), the end of branches, and how the bullwhip section. Up to 1.9 mm in length. (2) times the full Programme (Diplopoda): body elongated multi-footed, the abdomen by the two synthetic sections, each with two pairs of legs and the pores. The first large palate; small lip palate fused palate; sometimes monocular; antennae short, hammer-shaped; chest is 4 single, gonopore in Section 3. 0.3 ~ 28 cm in length. (3) Chilopoda (Chilopoda): body elongated multi-footed, many obvious abdominal section, each with a pair of legs, appendages of the first abdominal segment into a drug palate; gonopore in the margins. 0.5 to 26.5 cm in length. (4) Integrated Programme (Symphyla): small multi-footed, 3 clamp, 12 on the pereiopod and after a pair of spinnerets, gonopore in the trunk section 4. Up to 8 mm in length. (5) Collembola (Collembola): a small insect-like arthropod, widely distributed. Mouthparts foreign palate type; antennae are usually 4; eyes simple; three thoracic segments are sufficient; abdominal 6, a bifurcation of the bomb device; usually without the trachea; no Malpighian tubules (malpighian tubule). Up to 5 mm in length. (6) Insecta (Insecta): the formation of three pairs of appendages, mouthparts; head formed by the six, one pair of antennae, eyes and the eyes are often side; chest three, each with a pair of feet, in Section 2,3 Some winged; abdomen by a 11 composed of adults without appendages; gonopore in the post. 0.25 mm in length to 33 cm. 3 Amon crustaceans (Crustacea): the majority of; gills; strong exoskeleton; have antennae, big palate.
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Evolution
节肢动物 进化
Phylogenetic relationship with undetermined arthropod claws class (onychophores), slow type (tardigrades) and five classes (pentastomids). Arthropods on land, sea and fresh water are common. Small crustaceans, sea water is a major component of zooplankton, other invertebrates, fish and whale food. Dominant insects on land, as pollination of crops, pests, or to have important economic significance. Spiders, ticks and mites, scorpions and other spider-shaped class also live in the land. Despite the development of an effective insecticide, insects and ticks and mites are still threats to humans and animals around the world live. Spread malaria, yellow fever, rickettsial diseases, plague, filariasis, etc., destruction of grain, timber and food products. More than enough class to live in damp places, economic significance. Arthropoda (Arthropoda) range from deep sea to the mountains are distributed, and some even appeared to fly with wings, is the only true invertebrate animals adapt to life on land. Currently more than 1.2 million kinds of arthropods known, about the total number of animals known to 84%. More common in a variety of shrimp, crabs and other aquatic arthropods, there are spiders, centipedes, insects and other terrestrial species. Arthropods is an elongated, flat, section by section, to carrion-eating animals, some have two feet each. Australia hope to stay in the evolution century, about one million known species still alive today. Arthropods and the centipede is the more well-known enough to outline arthropod species. Arthropods (Arthropod) A section of limb and shell invertebrates, their shell will change with the growth process off. Are three main types of centipedes, millipedes, insects, spiders, and crustaceans subclasses. The ancestors of these three species have been developed in the Cambrian period of the whole building. Arthropods (Arthropoda) is the largest one the animal kingdom, is also the most dynamic range of goods, accounting for all animal species eighty-five%. Adaptation to the environment particularly strong, to survive places, including sea water, fresh water, mountain, air , soil, and even animals and plants in vivo and in vitro. Categories Extant arthropods, in addition to the extinct animal sub-clover outside the traditional reach and on the basis of whether the sub-divided into two doors. No antenna is called a chelating Amon animals, because the first one is to take the corresponding appendage after eating crayfish limb is named, including horseshoe crabs, scorpions, spiders, ticks and mites, etc.; have antennae called a jaw animal sub-gate, its 1 counterparts after the big jaw appendages, including Insecta, crustaceans, centipedes and millipedes and so on. But now most zoologists believe that animals have jaws Amon is a combination of man-made, included no genetic relationship between the groups. Therefore, the Arthropoda should be divided into four sub-gate: the extinct animal sub-clover door, the existing animal subphylum limb claws, crustaceans and single-branch animal subphylum subphylum. Amon clover animals showed the most primitive features, are living in the ocean. In addition to reach, the rest of the body sections are two-branch type appendages. Crayfish limb limb animal population sub-headings and the door Arachnida head appendages. Book gills and book lungs as homologous, indicating Outlines closer. Over the past crustacean subphylum Crustacea as a key link that is due to a large jaw and is thought to be more than enough with the classes, Insecta origin, but the crustaceans with two pairs of antennae and there is no other doors in the nauplius stage, should be a separate origin. Single branch and the origin of animals Amon Amon different in the ocean, it seems that evolved from the land, with antennae and big jaw, limb essentially as a single branch type, hence the name. Arthropoda Gang of 5 sub-door 20 as follows: The original arthropod subphylum (protoarthropoda) The original tracheal Gang Clover animals Amon (Subphylum Trilobitomorpha) Gang trilobites (Trilobita) Crayfish limb animal subphylum (Subphylum Chelicerata) Limb mouth Gang (Merostomata) Arachnida (Arachnida) Gang sea spider (Pycnogonida) Crustacean subphylum (Subphylurm Crustaceea) Head shrimp Programme (Cephalocarida) Gill Foot Gang (Branchiopoda) Paddle Foot Gang (Remipedia) Ostracoda Programme (Ostracoda) Programme to be shrimp (Mystacocarida) Micro shrimp Programme (Tantulocarida) Gang copepods (Copepoda) Gill Last Gang (Branchiura) Foot Man Gang (Cirripedia) Soft-Gang (Malacostraca) Single-branch animal subphylum (Subphylum Uniramia) Insecta (Insecta) Gang millipedes (Diplopoda) Chilopoda (Chilopoda) Candle butterfly Gang (Pauropoda) Integrated Programme (Symphyla)
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Encyclopedia
Arthropod arthropoda Is not the largest class of vertebrates. Symmetrical body, and a joint pairs of appendages; bones of the body surface, said exoskeleton; body section, but also differentiated into head, thorax, abdomen, or synthesis of a non-branch trunk; true body cavity body cavity and the original synthesis of the body cavity of blood .
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