Q:

What is the difference between vertebrates and invertebrates?

A:

Quick Answer

The primary difference between vertebrates and invertebrates is the presence of a backbone or spinal column, which vertebrates have and invertebrates do not. Examples of vertebrates are humans, dogs, cats and birds. Examples of invertebrates are flatworms, mollusks, sea urchins and insects.

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What is the difference between vertebrates and invertebrates?
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Full Answer

Vertebrates have a well-developed internal skeleton, an outer covering of protective cellular skin, an advanced nervous system and a highly developed brain. On the other hand, invertebrates are heterotrophic and multicellular, have no cell walls and have no backbone. The characteristics that differentiate vertebrates from their counterparts are their backbones, vertebrae and notochords.

Vertebrates are typically large in size because they have a versatile support system that enables them to develop more quickly. Invertebrates are mostly small and slow in movement. They do not have effective ways to support a big physique or the muscles needed to power a large body. Vertebrates are classified into five different groups: mammals, amphibians, fish, birds and reptiles. Invertebrates are classified into 30 phyla.

Only two percent of animal species are vertebrates, and the remaining 98 percent are invertebrates. Both live in a vast array of habitats, but vertebrates are more capable of adapting to all habitats, including land, air and sea. Vertebrates have a well-developed nervous system that enables them to react swiftly to environmental changes, but invertebrates have simple nervous systems that allows them to behave by instinct.

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    What are some fun facts about invertebrates for kids?

    A:

    Invertebrates are creatures without a backbone or similar spinal column, such as bees, spiders, centipedes, lobsters and ticks. They are distinguished from vertebrates, which do possess backbones. Invertebrates are the majority in the Kingdom Animalia, with some estimates saying that 97 percent of animals on the planet are invertebrates.

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    What animals don't have a backbone?

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    Animals that don't have a backbone include insects, spiders, scorpions and cephalopods. Bivalves such as clams, mussels and oysters lack a backbone, as do jellyfish, starfish, sponges, sea cucumbers and sea pigs. Crustaceans such as shrimp, lobsters and crabs lack backbones, as do worms such as earthworms and leeches.

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    What are invertebrate animals?

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    Invertebrate animals are animals that have no backbone and are cold blooded, meaning they cannot regulate their own body temperature, according to the National Wildlife Federation.

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    Which animals have a closed circulatory system?

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    All vertebrates, segmented worms, such as earthworms, and cephalopods, such as squid, have closed circulatory systems. Closed circulatory systems allow larger animals to be much more active than those with open circulatory systems, which are relatively inefficient in delivering oxygen to the organs and muscles.

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