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They are not, actually. The reason for that because animals with external skeletons (exoskeletons) have more surface area for their muscles to bind onto, giving them more leverage and strength. Animals with internal skeletons have far less surface area for the muscles to bind onto, thus limiting their strength. The average healthy human can lift their own body weight. Something like, oh say your average rhino beetle can lift up to 850 times their own body weight! Huge difference, and it's all because of surface area. The downside to having an exo skeleton, however, is that you have a limit on how large you can grow. The bigger you get with an exoskeleton, the more exponentially you'll feel the force of gravity on you until you simply can't hold yourself up anymore.

There are animals that have no backbone, but also lack an exoskeleton. These animals tend to be squishy, but many of them can actually regenerate body parts. A perk, if you ask me.

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12y ago

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Related Questions

In science what are animals without back bones?

Animals without backbones are called invertebrates.


Why do worms not have a skeleton?

Because they are invertebrates.. Invertebrates are animals without backbones, therefore they have no other bones either.


What bones are the vertebrae?

Vertebrae are the bones that comprise the spine of animals with backbones.


What animals do not have back bones?

Animals with no backbones are called invertebrates and they include insects, worms, spiders along with soft bodied animals such as sponges, sea anemones and jellyfish.Invertebrates are the animals without back bones.


What is an animal called with bones?

Well, almost every animal has bones. But animals with backbones are called vertebrates.


How do vertebrates differ from other animals?

Vertebrates have backbones, other animals (besides vertebrates) don't have back bones.


What is the difference between a simple animal and a complex animal?

complex animals have no back bones and simple animals have backbones


Do sponges have backbones?

No.


Animals that do not have internal skeletons or backbones are called?

Animals without back bones are called Invertebrates.


Are insects the only ones without a backbone?

None. They are invertebrates, which mean they do not have backbones, or bones of any type.


Is a red-tailed hawk an envernabrate?

If you mean to ask "Is the red tailed hawk an invertebrate" the answer is no. All animals that have backbones are vertebrates, and because hawks are birds and all birds have backbones, they, too, are vertebrates. Invertebrates are animals without bones, like insects, octopi, or clams.


Do squids have backbones?

No, squids are invertebrates which do not have back bones.