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Answered 2013-04-15 17:55:26

Chitin

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What is The external skeleton of many invertebrates is made of?

chitin


What do invertebrates have instead of a skeleton?

There are many animals which are invertebrates. Instead of skeletons they have other means of support; such as hard outer shells or fluid filled hydrostatic skeletons.


How many bones does an octopus have in its body?

None. Bodies are entirely soft with no skeleton


Can a living thing have a skeleton without a backbone?

A living thing can have a skeleton without a backbone they are called invertebrates. However, they do not have a skeleton like the way that humans do. So no bones, but they may have an exoskeleton or cartilage or many more options.


Can you conclude that your skeleton is important to your body?

The skeleton is extremely important to the body. It provides the internal framework for the body and protects many internal organs from external damage.


How many bones is made up of skeleton?

There's 206 bones in the human skeleton.


What do we call animals that do not have inside skeletons?

There is no one name for animals that do not have internal skeletons. Animals with an external skeleton are referred to as having an exoskeleton (adjective exoskeletal) and are commonly known as exoskeleton animals . There are many types of animals with exoskeletons, including crustaceans (crabs and lobsters) and insects such as grasshoppers and cockroaches. The shells of mollusks (snails, clams, etc) are also exoskeletons. In contrast to the internal skeleton, the external skeleton is not only designed to support but also protect the animal's body. An invertebrate is an animal that does not have a spine. Some invertebrates have exoskeletons, such as insects and crustaceans. Others, such as worms, slugs and jellyfish, have neither an internal nor external skeleton. Some animals, like the tortoise or turtle, have both an exoskeleton and an endoskeleton


How can you identify an arthropod?

Arthropods are invertebrates (animals without a backbone) with jointed legs and a hard exoskeleton (external skeleton). Within the arthropod group are insects (six legs), arachnids (eight legs), crustaceans (variable number of legs) and myriapods (millipedes and centipedes - many legs).


Do fish have a skeleton?

Yes. Many fish have a skeleton made out bones like us humans.


How many bones does a goat's skeleton have?

The skeleton of a goat typically has 189 bones. That is why many dishes made with goat do not contain as much meat as bones.


How many bones are made up the skeleton system?

206 bones


Which of these animals has its skeleton on the outside of its body ant horse or fish?

im pretty sure its fish or horse. I'm pondering about it too now..... Ant-many insects have an exo (external) skeleton like a roach.


Are invertebrates made of chitin?

Many invertebrates (though not all) have chitin in their structures. Arthropods (insects, crustaceans, etc.) have exoskeletons made of chitin. Insects (such as butterflies) have wings made of chitin. Mollusks have shells strengthened by chitin. Cephalopods (octopus and squid) have beaks made of chitin.


Is a fly an insect or a arachnid?

A fly is an insect, mainly because it has wings and only 2 eyes (but many lenses).A fly has soft skin and no skeleton (like a worm), while arachnids have an external skeleton.I hope this answer has been helpful.


How many mammals are invertebrates?

No mammals are invertebrates. All mammals are vertebrates.


How many different types of invertebrates are there?

there are 38 types of invertebrates


How many bones will you have when you becomes adult?

The adult skeleton is made up of 206 bones.


How many joints in a human skeleton?

There are many joints human skeleton


Is hydrostatic skeleton a form or type of skeleton?

A hydrostatic skeleton is a type of skeleton many animals in the animal kingdom have.


Are 95 percent of known species vertebrates or invertebrates?

I do not know if there is an exact percentage, but I do know that the of the known species, the most are invertebrates. This is because bugs are invertebrates. There are so many different species of bigs, just the insects alone, that we cannot find and name them all. Also you have many other groups of invertebrates.


How many backbones does a great white shark have?

sharks dont have bones... their skeleton is made of cartilage


Why the vertebral column of the human skeleton made up of many bones?

Many bones have many joints, hence, great flexibility.


Do all invertebrates have an endoskeleton?

invertebrate implies that the animal does not have a skeleton... but not all invertebrates have an exoskeleton (what i think you meant to ask). ex: a worm Invertebrates can have an endoskeleton (like echinoderms, among them starfish, sea urchins) or an exoskeleton (like insects) while some invertebrates lack a skeleton completely (also some like certain sea cucumbers are entirely soft bodied but ancestors may have had a skeleton or they have have a skeleton whose pieces can be separated to give them flexibility to fit into cavities to avoid predators; so technically these types have a skeleton even though it's not always solid; moreover sponges have spicules to give them firmness although the spicules may not be connected but I think this is not a true skeleton since ancestors of present sponges never had a solid or firm piece of something composed in part of calcium- note many sponges contain silica so I think that would not be a true skeleton on the basis it has no calcium and/or not connected together into one stiff piece). Note echinoderms are relatively closely related to vertebrates forming much of the taxon deuterostoma and both contain an endoskeleton (insects are a type of protostome and jellyfish lower still next to sponges at the bottom of the evolution tree of large-ish animals).


Is an octopus a vertebrate?

No. Because an octopus has no internal skeleton or spine/back bone, it is classified as an invertebrate.More information:The octopus is a mollusk, a grouping with many various characteristics. Squid are also mollusks. Both fit into the definition of invertebrates because they do not have an internal skeleton with a spine. For more information about mollusks, see the related links with this question.


How many phyla include only invertebrates?

All phyla except for one (Chordata) include only invertebrates, so 8 phyla include only invertebrates. The phylum Chordata is made up of the subphylum Vertebrata so therefore Chordata also has some species in it that are invertebrates. Humans are included in the phylum Chordata as well as the subphylum Vertebrata.