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\nHow to live without a heart or a brain - Lessons from a Jellyfish\n

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\n\nPublisher:\n\nScience ABC\n\n\n
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\nThe jellyfish is one weird sea animal. What makes it even weirder is that it doesn’t have a brain or a heart. Though it doesn’t have a brain, it does have a nervous system in the form of nerve nets and some have a structure called a...\nThe jellyfish is one weird sea animal. What makes it even weirder is that it doesn’t have a brain or a heart. Though it doesn’t have a brain, it does have a nervous system in the form of nerve nets and some have a structure called a nerve ring. This allows the jellyfish to reflexively respond to its surroundings. Some jellyfish like box jellyfish even have structures similar to a human eye that can see in 3-D images located inside the edge of their bell. The jellyfish also don’t have a heart and neither do they need it. In animals with a heart, the heart functions to distribute oxygen and nutrients throughout the body. For the jellyfish, oxygen simply diffuses from the water into their cells. Similarly with food, the jellyfish has a rudimentary stomach, called the gastroventricular cavity where food is digested and nutrients are directly absorbed into the jellyfish. *Nature or evolution aren’t conscious decision makers, designing life as they see fit. Evolution is a phenomenon where random genetic mutations create changes in traits over many generations.\n
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Resource Details

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Educator Rating
Not yet Rated
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Media Length
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5:02
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Grade
Pre-K - Higher Ed
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Subjects
Science
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Media Type
Instructional Videos
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Source:
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\nScienceABC\n\n
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Date
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2020
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Language
English
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Audiences
For Teacher Use
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Usage Permissions
Fine Print: Educational Use
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Concepts

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jellyfish, ocean currents, functions, cells, water, blood, food, animation
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Additional Tags

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do jellyfish have brains, do jellyfish have eyes, do jellyfish have hearts, how do jellyfish live without a brain, box jellyfish, how do jellyfish eat, heart, brain, stomach, science, curiosity, nerve net, master controller, nervous system, nerve aggregates, nerve ring, called, ectoderm, body, thrive, blob, world, sense, courtship, thin, store, mesoglea, endoderm, mouth, simple, mystery, ropalia, mesoglia
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Classroom Considerations

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Best For: Explaining a topic
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