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flatworms&roundworms
quiz
| Term | Definition |
|---|---|
| radial symmetry | radiate from a central point |
| asexual reproduction | budding, fragmentation, regeneration, cysts |
| sexual reproduction | hermaphrodites (both male and female) |
| body of a sponge | made of a flexible protein called spongin |
| nematocysts | microscopic needles filled with venom and triggered by touch |
| jellyfish | mobile, delicate invertebrates that use tentacles to trap prey |
| sea anemones | sessile (can’t move) invertebrates that use tentacles to trap prey |
| coral | sessile organisms protected by story covering |
| invertebrates | no back bone and soft body |
| bilateral symmetry | equal left and right halves (sides are mirror image) |
| cephalization | distinct head region |
| acoelment | no cavity between mesoderm and endoderm |
| ectoderm | outer layer of tissue |
| mesoderm | middle layer of tissue (usually muscles) |
| endoderm | inner layer of tissue |
| mouth | where food enters |
| pharynx | muscular tube that passes food to the gut |
| gut | organ for digestion and absorption (like intestine) |
| wastes | diffuse out of the body through the skin |
| flame cells | excrete excess water and nitrogen wastes |
| primary host | where the parasite reproduces sexually |
| intermediate host | where the parasite reproduces asexually |
| tegument | outer layer that protects them from being digested (by the host) |
| respiration | gases easily diffuse |
| brain | collection of nerves at the head end of the worm |
| ganglia | collection of nerves all over the worm (coordinate responses) |
| eyespots | groups of cells sensitive to light (cannot form images) |
| muscle cells | contract to move the worm |
| cilia | microscopic hairs used for movement |
| fission | splitting into 2 worms |
| regeneration | able to regrow missing or damaged body parts |
| copulation | lining up to exchange gametes |
| hermaphrodites | contain both male and female reproductive cells |
| flukes | parasitic flatworms that inhabit internal organs of their host |
| blood flukes | reproduce in the blood vessels (not intestines) |
| Schistosoma | Parasite that causes schistosomiasis |
| schistosomiasis | clogs blood vessels which destroys other vital organs (liver, lungs, intestines) |
| liver flukes | inhabit in the liver |
| bladder flukes | inhabit in the urinary bladder |
| lung flukes | inhabit the lungs |
| intestinal flukes | inhabit the intestine and rob host of nutrients |
| scolex | head region that has hooks and suckers |
| proglottids | body segments that contain reproductive organs |
Created by:
KiahnaL
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