What is the definition of arthropod in biology?

Asked By: Orysya Zanzi | Last Updated: 9th April, 2020
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Definition of arthropod. : any of a phylum (Arthropoda) of invertebrate animals (such as insects, arachnids, and crustaceans) that have a segmented body and jointed appendages, a usually chitinous exoskeleton molted at intervals, and a dorsal anterior brain connected to a ventral chain of ganglia.

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Keeping this in view, what are 5 characteristics of arthropods?

5 Characteristics of an Arthropod

  • Exoskeleton. Arthropods are invertebrates, which means their bodies do not have internal bones for support.
  • Segmented Bodies. Arthropods have bodies that are internally and externally segmented.
  • Jointed Appendages.
  • Bilateral Symmetry.
  • Open Circulatory System.

Also Know, what are the major characteristics of arthropods? Characteristics shared by all arthropods include:

  • Exoskeletons made of chitin.
  • Highly developed sense organs.
  • Jointed limbs (the limbs must be jointed like the joints in a suit of armor, since the exoskeleton is rigid and cannot bend to allow movement)
  • Segmented bodies.
  • Ventral nervous system.
  • Bilateral symmetry.

One may also ask, what does the name arthropod mean?

arthropod. An arthropod is an animal with no internal spine, a body made of joined segments, and a hard covering, like a shell. Spiders are one type of arthropod. The Modern Latin root is Arthropoda, which is also the name of the animals' phylum, and which means "those with jointed feet."

What are the 4 types of arthropods?

Arthropods are divided into four major groups:

  • insects;
  • myriapods (including centipedes and millipedes);
  • arachnids (including spiders, mites and scorpions);
  • crustaceans (including slaters, prawn and crabs).

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What is unique about arthropods?

All Arthropods share certain characteristics making them unique from other phyla. The muscles of an Arthropod are connected to the inside of the exoskeleton, because the animal lacks an internal skeleton of any type. The exoskeleton is made of a tough substance called chitin (KIE-tin).

Why are arthropods important to humans?

Arthropods are beneficial for other foods that humans eat, especially through the pollination of crops. More than 100 food crops are pollinated by arthropods on a yearly basis. Bees, one of the major plant pollinators, also produce honey.

How do you classify arthropods?

Arthropods are traditionally divided into 5 subphyla: Trilobitomorpha (Trilobites), Chelicerata, Crustacea, Myriapoda, and Hexapoda. Myriapoda is divided into four classes: Chilopoda (centipedes), Diplopoda (millipedes), Pauropoda, and Symphyla. Millipedes were likely the very first animals to live on land.

What are the classification of arthropods?

Arthropoda

What do arthropods eat?


Arthropods can be grouped as shredders, predators, herbivores, and fungal-feeders, based on their functions in soil. Most soil-dwelling arthropods eat fungi, worms, or other arthropods. Root-feeders and dead-plant shredders are less abundant.

How do arthropods grow?

Growth and Molting
Arthropods grow by forming new segments near the tail, or posterior, end. Unlike mollusk shells, the exoskeleton of arthropods does not grow along with the rest of the animal. As the body underneath the exoskeleton grows, the animal begins to outgrow its tough exterior.

How do arthropods move?

Arthropods move using their appendages as legs on land and as paddles in aquatic environments. They have striated and smooth muscles, similar to those of vertebrates, that connect to the exoskeleton for support. Winged insects are also able to move by flying.

Why arthropods are called so?

Arthopod is a word that is derived from a Greek word called Arthropoda. The meaning of Arthopoda is Joint foot. Thus, Arthopods are joint foot invertebrate animals having external skeletons. They don't have skin, instead they have hard body surfaces i.e., External Skeleton.

What is another word for arthropod?

millepede onychophoran invertebrate arthromere Scutigerella immaculata garden symphilid myriapod arachnoid Arthropoda carapace cuticle phylum Arthropoda class Merostomata velvet worm tongue worm peripatus tardigrade trilobite crustacean instar sea spider pentastomid horseshoe crab eurypterid sclerite pycnogonid

How are arthropods harmful to humans?


Arthropods are of ecological importance because of their sheer numbers and extreme diversity. Arthropods are both harmful and helpful to humans. A few species are transmitters of bacteria or viruses that cause diseases such as malaria, yellow fever, encephalitis, and Lyme disease.

Are shrimp bugs?

They're called crustaceans. Shrimp, crabs, lobsters – they're arthropods, just like crickets. They're also scavengers, which means their diets are as filthy as any bug's. “Minilivestock” and “land shrimp” can do for bugs what “mountain oysters” have done for bull testicles .

What is an exoskeleton made of?

Exoskeletons are the hard coatings on the outside of some animals, mostly arthropods. They are nonliving, made of chitin and calcium carbonate. Exoskeletons support the animal's body and protect the creature from predators, water, and drying out.

Are Crabs spiders?

Technically, they're not that closely linked, although crabs and spiders are both members of the arthropod family, as are other insects, and lobsters. Basically, they're classed together because they all have exoskeletons and jointed legs.

Where are arthropods found?

This phylum includes insects like butterflies and beetles, crustaceans like crabs and lobsters, and chelicerates like spiders and scorpions. Arthropods are found in all parts of the world in a wide variety of environments, from the deep sea to the frozen arctic regions.

Are arthropods cold blooded?


Arthropods are cold blooded -- which means, their body temperature depends on the temperature of the environment surrounding them. Arthropods are some of the most interesting animals in the world! They fly, they creep, and they crawl.

Are Crabs spiders of the sea?

Sea spiders usually have eight legs, which are long and attached to a small body, just like many true spiders. And although sea spiders are arthropods that live in the ocean, they are not crustaceans, such as crabs or shrimp.

Are bees arthropods?

The answer is yes. In biological classification, honey bees belong to Class Insecta that comes under Phylum Arthropoda. Arthropoda in Greek means animals with jointed legs. Being social insects, honeybees maintain social order with a remarkable level of division of labor among members.