Chapter 7 Test (Jellies And Wormys) Flashcards
How do ribbon worms capture their prey?
Proboscis:
Long, fleshy tube used to entangle prey
Straw like extension nematodes use to get nutrients
Stylet
Sponges cells that help with feeding
Choanocytes: collar cells
Sponge phylum
Porifera (pore bearer)
Nematocyst
Unique stinging structures found within cells in the tentacles
Why are flatworms flat
-dorsoventrally flattened
Meaning they have flat bellies and backs
Explain why a portuguese man of war is a hydrozoan
Hydrozoans are colonies of tiny polyps and Portuguese man-of-war are covered by tiny polyps
How does a sponge reproduce sexually
Most sponges are both male and female. In sexual reproduction, they may play either role. The ‘male’ sponge would release sperm into the water, which would travel and then enter a ‘female’ sponge. After fertilization in the sponge, a larva is released into the water. It floats around for a few days and then sticks to a solid to begin its growth into an adult sponge.
How do you sponges reproduce asexually
Sponges reproduce asexually by budding which is when a small piece of sponge breaks off and is still able to survive and grow into another sponge
What are all flukes
Parasites
Turbellarians
Most common marine flatworm
What are tapeworms
Parasitic
Where do tapeworms live
In the intestines of vertebrates
What is a hydrostatic skeleton
A system that uses water pressure against the body wall to maintain body shape and aid in locomotion and support
How do jelly fish capture their prey
Each jellyfish tentacle is covered with thousands of cells called cnidocytes, which house nematocysts containing stinging threads. When a jellyfish encounters another object, pressure inside the nematocyst causes the threads to uncoil. The stinging cells spring out at the unwitting victim like tiny darts, firing venom into it. The venom is a neurotoxin designed to paralyze jellyfish prey.
