Insects also contain a pair of compound eyes in the head. Both insects and arachnids are cold-blooded. Insects own colorless blood; on the contrary, arachnids have blue-colored blood. Insects and arachnids are two classes of the phylum Arthropoda. All Rights Reserved. All three are members of the Animal Kingdom but in different ways. Some species use silk as a weapon to catch prey or apply it for their reproduction. Archanis also have eight appendages and no antennae. Arachnids can eat all things, liquid, and solid food. The blood of insects is colorless, while arachnids have blue-colored blood. Insects move in three ways: by walking, swimming, or flying. In addition to insects and arachnids, there are mammals, birds, amphibians and reptiles, fish and invertebrates. Several groups secrete venom from specialized glands to kill prey or enemies. Therefore, arachnids are carnivorous animals. Arachnids belong to subphylum Chelicerata classified in Arachnida class. The difference lies in the shape of the mouthparts. Insects are a more widespread group of animals. We often lump arachnids, such as spiders, in with insects. Arachnids: Arachnids undergo a series of molts. Insects: Insects undergo complete metamorphosis. Insects respire through trachea; on the other hand, arachnids respire via trachea and book lungs. Elyse Hauser is a Seattle-based writer and editor with a Master's in Writing Studies from Saint Joseph's University. Only in the harvestmen and among mites, such as the house dust mite, is there ingestion of solid food particles, and thus exposure to internal parasites, although it is not unusual for spiders to eat their own silk. Over 100, 000 species of arachnids have been identified all over the world. Within the Animal Kingdom, under the Arthropod phylum, you’ll find the classes of Insects and Arachnids. Their blood is blue in color since it contains hemocyanin. Secret 6,500-Year-Old Copper Workshop Discovered, Why Do We Call Aliens “Little Green Men?”, © 2020 LifeSavvy Media. Insects have six legs and wings. Arachnids are small invertebrates with jointed legs. These animals have four pairs of legs. The main difference between Insect and Arachnids is that Insect is an invertebrate with three body segments, compound eyes, and a pair of antennae, whereas Arachnids are invertebrates which possess two body parts, simple eyes, and no antennae. However, other kinds of arachnids, like scorpions, are clearly very different from insects. Insects are small animals categorized as invisible to 7 inches long. Arachnids: Arachnids have blue color blood. As with many words, bug has a different meaning in casual conversation than it does in science, so people often use the term “bug” loosely when referring to all kinds of insects and arachnids. Cicadas are Hemiptera, but spiders aren’t. Insects exist in all environments, whether land, freshwater, or marine life. In addition to spiders, ticks and mites are arachnids that are often mistaken for insects. Arachnids are cold-blooded animals whose blood temperature depends on the temperature of the environment. Insects move by swimming, walking, or flying; on the flip side, arachnids move by creeping or crawling. They hatch eggs but, do not undergo metamorphosis. However, all true bugs, like aphids and cicadas, are also insects. For example, bees have a proboscis, but they’re not true bugs. Insects: Insects have one pair of antenna. Her work has appeared in publications like. We do not implement these annoying types of ads! Arachnids also lack the antennae that help define insects, and they never have wings. Luckily for us, those fluids often come from plants. Arachnids are small, creepy, and crawling animals. Both insects and arachnids are triploblastic, haemocelomic animals with bilateral symmetry. So, bugs are a type of insect, and both insects and arachnids are a type of arthropod. The class Insecta is the most significant class in phylum arthropod. What is the Difference Between Insects and Arachnids      – Comparison of Key Differences, Key Terms: Antennae, Arachnids, Arthropoda, Exoskeleton, Eyes, Insects, Invertebrates, Jointed Appendages, Segmented Body, Wings. Several mites and ticks are parasites, some of which are carriers of disease. [1], Public Domain) via Commons Wikimedia2. An insect is recognized as having a pair of antennae, while arachnids lack antennae. Non-bug insects include ants, mosquitoes, and butterflies. The difference is that non-bug insects, like bees, have a retractable proboscis. Figure 2: Arachnid Body Structure Four pairs of legs, (2) Cephalothorax, (3) Abdomen. Insects: Insects consist of three pairs of appendages. Both insects and arachnids have compound eyes and antennae. Bugs are actually a type of insect. Many of the so-called bugs you’re most familiar with aren’t truly bugs, but insects. Insects are small arthropods possessing six legs and one or two pairs of wings. Arachnids: Arachnids do not have an antenna. 1. Here’s how to tell them apart. Insects and arachnids are two types of arthropods with jointed appendages. The main difference between insects and arachnids is that insects have six legs and up to four wings whereas arachnids have eight legs. For example, millipedes and centipedes aren’t insects: they actually have more in common with shrimp and lobsters. Apart from work, she enjoys exercising, reading, and spending time with her friends and family. Typically, insects are small invertebrate animals. A Brief History of the Mojave Phone Booth, Artificial Lung Provides Assistance Through Umbilical Cord. The body of insects is composed of three sections: head, thorax, and abdomen. But if you want to be accurate, “bug” actually means a very specific group of insects: those with non-retractable proboscises. But in truth, bugs, insects, and arachnids are three separate categories for the tiny crawling and flying creatures you might be familiar with. Both insects and arachnids have a complete digestive system. Arachnids have 8 legs, insects have 6 legs. We often lump arachnids, such as spiders, in with insects. Most species live on land, and some are inhabitants of the water. Insects are categorized as flies, butterflies, and fleas; on the other side, arachnids are categorized as ticks, mites, and spiders. Insects, arachnids, and myriapods What is a bug? Insects and Arachnids are both invertebrates belong to phylum arthropods. Read our collection of articles discussing all sorts of ants, bugs, butterflies, spiders … Arachnids have eight legs and no wings. Insects belong to class Insecta; on the other hand, arachnids are a member of class Arachnida. Arthropods are triploblastic, haemocoelomic animals. Insects form about 90% of all animals on the earth. What is the Difference Between Sea Slug and Sea... What is the Difference Between Fleas and Mites, What is the Difference Between Shamrock and Clover, What is the Difference Between Water Lily and Lotus, What is the Difference Between Council and Committee, What is the Difference Between Milk Steamer and Frother, What is the Difference Between Stoneware and Ceramic, What is the Difference Between Chef Knife and Utility Knife, What is the Difference Between Parental Involvement and Engagement, What is the Difference Between Coffee Maker and Percolator. The Insects class is then divided up into several different orders, one of which is Hemiptera, or true bugs. For one, all arachnids have eight legs, while all insects have six legs. Spider, ticks, mites, scorpions; on the flip side, harvestmen are some examples of arachnids. Insects use trachea as an organ for respiration; on the converse side, the organs for respiration in arachnids are trachea and book lungs. The body of both insects and arachnids is segmented. The eyes of insects are compound, whereas arachnids have simple eyes. Both insects and arachnids are mainly terrestrial. These small creatures vastly outnumber humans, so you might as well learn about them— they’re all around you! Some of the characteristics that make it unique to the species are a hard exoskeleton made of chitin; the body has three segments head, thorax, and abdomen, six legs, a pair of an antenna at the head and compound eyes. In addition to spiders, ticks and mites are arachnids that are often mistaken for insects. “Bugs” and “insects” often seem like catch-all terms for creatures like flies, ants, and spiders. Insects are widespread in all types of habitat; conversely, arachnids are mostly terrestrial. Both insects and arachnids have compound eyes and antennae. However, if you sometimes mix up these separate categories, you aren’t likely to be judged for it. The insect has an antenna in its head region; on the flip side, the antennae are absent in arachnids. Insects are small creatures that vary in length, whereas arachnids are small, crawling creatures that belong to arthropods. Join 250,000 subscribers and get a daily digest of news, articles, and more. The insect has millions of species; on the flip side, arachnids have about a lac species. The typical body structure of an arachnid is shown in figure 2. Their body is covered with an exoskeleton made up of chitin. Insects have pairs of appendages near their mouth; on the flip side, arachnids have pairs of appendages near mouth named Chelicerae. Both Insects and arachnids are invertebrates that belong to the phylum Arthropoda. However, there are also some creatures you may think of as insects that aren’t. Insects: Insects are small arthropods who possess six legs and one or two pairs of wings. Arachnids: Arachnids have one to six pairs of simple eyes. Some insects contain wings connected to the thorax. Both insects and arachnids are mainly terrestrial animals. Insects have three pairs of appendages; on the contrary, arachnids have four pairs of appendages. Both insects and arachnids have joint legs. Some of the examples of insects are beetles, ladybirds, ants, bees, butterflies, and mosquitoes. All insect starts their life from the hatching of eggs. Insects can exist in all habitats, whereas most of the arachnids live on land. Most of the organisms reside on land and freshwater while fewer species in seas and oceans. We've detected that you are using AdBlock Plus or some other adblocking software which is preventing the page from fully loading. Arachnids: The body of the arachnids is divided into cephalothorax and abdomen. Most of the insects have wings that help them to fly; conversely, arachnids do not have wings. In casual language, “bug” can refer to any type of insect or creepy-crawly thing. Janet White is a writer and blogger for Difference Wiki since 2015. Insects are those invertebrates who have evolved the feature of flying with wings.