What are Cnidarians?
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What are Cnidarians? Invertebrate animals that use stinging cells to capture food and defend themselves.
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What are Cnidarians?. Invertebrate animals that use stinging cells to capture food and defend themselves. Cnidarians Body Structures. Polyp - vaselike shape and usually adapted for a life attached to an underwater surface. Medusa - a bowl shape and adapted for a free-swimming life. - PowerPoint PPT Presentation
Transcript of What are Cnidarians?
What are Cnidarians?
Invertebrate animals that use stinging cells to capture food and
defend themselves.
Cnidarians Body Structures
Polyp - vaselike shape and usually adapted for a life attached
to an underwater surface.Medusa - a bowl shape and
adapted for a free-swimming life.
How cnidarians obtain food?
A stinging cell containing a thread with spines is shot into prey. Some spines contain venom.
When prey is helpless, cnidarians use tentacles to pull prey into
their mouths.
Anemone eatinghttp://www.youtube.com/watch?v=ctqvqES1PE8&feature=related
http://www.youtube.com/watch?v=o1A5acWEERA&feature=related
Clown fish and anemonehttp://www.youtube.com/watch?v=NtfQ3aIBpGY&feature=related
http://www.youtube.com/watch?v=I089Tw7Fk_A&feature=related
How do cnidarians move?
A nerve network, not nervous system, conducts signals from sensory cells to muscle cells allowing them to respond to
danger and prey.
How do cnidarians move?
Video
How do cnidarians move?
video
How do cnidarians reproduce?
Sexual – Some species have both sexes, some are male and female.
Asexual – Polyps are asexual, some bud similarly to sponges
some pull apart.
Reproductionhttp://www.youtube.com/watch?v=u8LGZaezpV8&feature=related
Medusa life cycle
