Phylum: Arthropoda Essay

Arthropod's doors are the largest and most diverse in the animal kingdom. It contains over one million listed species. This is about three quarters of all known or extinct creatures. Numerous arthropods are not listed (nor have they been studied nor studied yet), the actual number of species may be over 10 million. Better known arthropods include fossil trilobites as well as insects, crustaceans, and spiders. Arthropods are found in almost all known marine (ocean), freshwater and onshore (land) ecosystems, with huge differences in habitat, life history and dietary preferences.

Other people use the lungs of the books, or cockroaches that breathes air like crabs of coconuts. A part of the soldier's crab's foot is covered with an oxygen absorbing membrane. Terrestrial crab diver sometimes has two different structures; one is for breathing in water and the other for oxygen absorption (false)

Arthropods have an open circulation system. Blood lymph, including hemocyanin, copper-based oxygen carrying protein, is pushed into the body cavity by a series of hearts in direct contact with the tissue. The arthropod is a stone. Although it has weight, it is shrunk into a small body cavity around the reproductive organs and excretory organs, but the body cavity of the body is a hemoglobin full of blood lymph and is directly immersing the organ. The body of the arthropod is usually divided into a series of different segments and pre-calendar keels, which support the compound eye, monocular and rear segments. These are divided into different, special body areas called tagmata. Each part at least initially supports a pair of appendages

The stratum corneum of arthropods forms a hard exoskeleton consisting mainly of chitin, which falls periodically as animals grow. They contain internal regions (primary cells) consisting of protein and chitin (polysaccharide), and they are responsible for the strength of the exoskeleton. Outer area (top) is on the surface

There is still a wider grouping. The hierarchical grouping proposed by Linnae for the first time is called a taxonomic group (singular: taxon). From the broadest to the broadest, these taxa have the following names: species belong to the category of family order (division). Descendants of members of different species. You sometimes

The largest door in the animal kingdom, including arthropods, arbitrary members of arthropod door, familiar shapes such as lobster, crab, spider, tick, insect, cricket and yasde. About 84% of all known animal species are members of the gate. Arthropods are found in all habitats on the planet and show various adaptability. There are several types living in the aquatic environment, others live in the global environment; some groups are suitable even for flight. A prominent feature of arthropods is the presence of articular bone coverings consisting of chitin (complex sugar) bound to proteins. The exoskeleton of this inanimate object is secreted from the underlying epidermis (equivalent to the skin of other animals). Arthropods lack exercise cilia, even in the larval stage, probably due to the presence of the exoskeleton

Arthropods are usually divided into four subspecies of existing shapes: Celicerata, crustaceans, hexapoda and myriadoda. Among zoologists, we believe that single branched arthropods, especially insects, crickets and mandibles, evolve from independent ancestors, so they are divided into separate gates. It is Atelocerata; however, in this treatment these forms are dispersed in several variants. In addition, the door of the arthropod contains an extinct subfamily Trilobitomorpha. This group consists of trilobites, the main arthropods of the early Paleozoic era (542 million to 251 million years ago). The Triassic was extinct during the Permian age of the Paleozoic era (2.99 million to 251 million years ago).