Arthropods

No, arthropods are coelomates

Crayfish are classified as arthropods, because of their characteristic segmented bodies, chitinous exoskeleton, and joint appendages.

Examples of arthropods would be insects like the tsetse fly, the bullet ant, the lightning bug; myriapods like the millipede, crustaceans like krill, lobster, crayfish, crabs.

Echinoderms includes such creatures as sand dollars, sea urchins, starfish.

Pollenization with the help of an insect (or bird, or bat) is called biotic or vector-based pollenization. Abiotic pollenization happens by virtue of wind or water.

Arthropods don't have backbones. The vertebral column or spine comprises individual bones (vertebrae) as part of an internal skeleton or endoskeleton. Arthropods by contrast have no bony internal skeleton, instead they rely on a chitinous external or exoskeleton, consequently they also evidence joint appendages and segmented body which characterize the phylum.

Jointed legs, exoskeleton, growth by molting.

The largest arthropod subphylum is Hexapoda. By count the most arthropod species fall under the Insecta class, with a million species described and millions estimated yet to be described. By count, insects are over half of all living animals and by some estimates may constitute up to ninety percent of all living animals on the earth. In biomass, krill take the top spot weighing in from up to half to three quarters of a billion tonnes, and thus having a huge significance in the food chain.

Many factors contribute to bird navigation during long distance migrations, including learning, instinct, their solar compass (perception of sun orientation and day length), landmarks, olfactory cues, and a curious ability still being researched called magnetoception (or magnetoreception) which enables them to detect the orientation of the earths magnetic field. The mechanism is not fully understood but some tests indicate that homing pigeons, for example, might exploit magnetite contained in small deposits around the beak. Another theory suggests that a complex protein called cryptochrome might affect bird vision by altering the sensitivity of retinal neurons such that, in effect, birds might be able to 'see' the earth's magnetic field.

Most only do so in larval/juvenile stages, when it's time to grow. Some arthropods such as tarantula females continue growing and molting until death. Also, when damage has occurred (torn off leg for example) molting can be induced earlier to develop and grow new appendages. :)

The exoskeleton of arthropods defines their gross morphology (as determined and maintained by principles of genetic expression); although life stages may evidence significant differences (egg and larval stages, versus adult shape, for example). Since the exoskeleton can't grow owing to its rigidity, arthropods need to periodically shed it in order to increase in size, a process called ecdysis.

well i don't know about non arthropods but this is what i know about arthropods:-

Arthropods have jointed legs and a head and segmented body parts called the thorax and abdomen. An arthropod's body is covered by a shell or a hard outer skin called an exoskeleton. It is made of a material called chitin. The exoskeleton has a special top layer, the cuticle, which is thick and tough. In crustaceans, the exoskeleton is sometimes called the carapace and hides the segmented body parts.

by kira 7G

Under the arthropoda phylum are subphyla Chelicerata, Myriapoda, Crustacea, and Hexapoda. (There is also an extinct class Marrellomorpha and an the extinct Trilobite subphylum). The chelicerata include spiders, scorpions, mites, etc. Myriapods include centipedes and millipedes. Crustaceans include lobsters, krill, crabs, shrimp, woodlice, etc. Hexapoda include the class Insecta, the insects.

Comparten muchas características, es decir, son similares porque no tienen columna vertebral sino exoesqueleto y otros tienen cuerpo y patas articuladas y más características.

They share many characteristics, that is, they are similar because they do not have a spine but an exoskeleton and others have articulated body and legs and more characteristics.

By count the most arthropod species fall under the Insecta class, with a million species described and millions estimated yet to be described, evidencing an immense diversity. By count, insects are over half of all living animals and by some estimates may constitute up to ninety percent of all living animals on Earth.

Yes, having an exoskeleton is a defining characteristic of arthropods. Animals with internal skeletons belong to three other phyla, for example Chordata - the chordates, including mammals, reptiles, amphibians, etc.

Phylum Arthropoda hosts at least eighteen classes, (not counting those yet to be fully classified):

Trilobita - trilobites (extinct)

Arachnida - spiders, scorpions, etc.

Merostomata - horseshoe crabs, eurypterids (extinct), etc.

Pycnogonida - sea spiders

Chilopoda - centipedes

Diplopoda - millipedes

Pauropoda - sister group to millipedes

Symphyla - resemble centipedes

Branchiopoda - brine shrimp etc.

Remipedia - blind crustaceans

Cephalocarida - horseshoe shrimp

Maxillopoda - barnacles, copepods, fish lice, etc.

Ostracoda - seed shrimp

Malacostraca - lobsters, crabs, shrimp, etc.

Insecta - insects

Entognatha - wingless

Camptophyllia (extinct)

Marrellomorpha (with one extinct species)

The crustaceans are arthropods with biramous (branching) appendages, including a larger and smaller pair of antennae, the smaller ones being referred to as antennules.

Because of a process called Ecdysis (also known as moulting) arthropods are able to grow bigger. In ecdysis old exoskeleton is shed and new one (slightly bigger) covers the body.

No. Leeches are annelids, also known as segmented worms.

all arthropods are not insects because.. Arthropods aka the Phyla Arthropoda consists of 4 classes. (yr 1 university level here :D ) they are the Crustacea arachnida myriapoda and as you said the insecta. ok so these CLASSES are well defined by the characteristics the organisms of the class bear in common. hence one should not confuse the insect class with the phyla arthropods because one is a main category whilst one is a sub category which aid in defining the main category as a whole. hope this was helpful.

The body of arthropods is physically supported by an external skeleton (exoskeleton) made of a tough protein called chitin. Because it is inflexible, arthropods need to shed it entirely in order to grow in size.

external sexual

Phylum: Arthropods

Subphylum: Hexapods

Class: Insecta

Family: Bombycidea

Genus: Bombyx

Specie: Bombyx Mori

Radwan Dabaja.