Podcast
Questions and Answers
What are the individual disc-shaped bones that make up the spine commonly referred to as?
What are the individual disc-shaped bones that make up the spine commonly referred to as?
Approximately how many vertebrae are present in the human spine, as mentioned in the text?
Approximately how many vertebrae are present in the human spine, as mentioned in the text?
Which of the following animal classes is classified as vertebrates?
Which of the following animal classes is classified as vertebrates?
Which of the following groups of animals is classified as invertebrates?
Which of the following groups of animals is classified as invertebrates?
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What percentage of the animal world do invertebrates constitute?
What percentage of the animal world do invertebrates constitute?
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Based on the examples provided, which animal possesses the highest number of vertebrae?
Based on the examples provided, which animal possesses the highest number of vertebrae?
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What is the defining characteristic of a vertebrate animal?
What is the defining characteristic of a vertebrate animal?
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What is a common feature shared by all invertebrate animals?
What is a common feature shared by all invertebrate animals?
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Which of the following statements accurately compares the number of vertebrae in different vertebrates?
Which of the following statements accurately compares the number of vertebrae in different vertebrates?
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What is another term used by scientists to refer to the 'backbone'?
What is another term used by scientists to refer to the 'backbone'?
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Study Notes
The Backbone and Spine
- The spine, or backbone, is a series of interconnected disc-shaped bones called vertebrae.
- Humans have 33 vertebrae.
- Feeling along the middle of your back will reveal a series of bumps, each representing a vertebra.
- Vertebrates are animals with an internal skeleton made of vertebrae.
Vertebrate Animal Classes
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Amphibians (frogs, newts)
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Fishes (tuna, sharks)
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Reptiles (snakes, alligators)
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Birds (parrots, penguins)
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Mammals (monkeys, dolphins)
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Different vertebrate species have varying numbers of vertebrae. For example, alligators have about 66, and snakes can have as many as 500.
Invertebrates
- Invertebrates are animals without a spine, meaning they lack vertebrae.
- Invertebrates are far more numerous than vertebrates. About 98% of animal species are invertebrates.
- Examples of invertebrates include insects, spiders, worms, sponges, jellyfish, sea stars, sea urchins, squids, octopuses, crabs, shrimp, and lobsters.
Vertebrates vs. Invertebrates
- Invertebrates outnumber vertebrates significantly, comprising approximately 98% of the animal kingdom.
- Vertebrates comprise only about 2% of animal species.
- Millions of invertebrates still remain undiscovered.
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Description
Test your knowledge about vertebrates and invertebrates through this quiz! Explore the structure of the backbone, the different classes of vertebrate animals, and the vast diversity of invertebrates. See how much you know about the animal kingdom's skeletal systems!
