Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Biology Chapter 27
Flatworms and Roundworms
| Question | Answer |
|---|---|
| Platyheminthes | the phylum flatworms are grouped into |
| Characteristics of Flatworms | soft, flattened worms that have tissue and internal organ systems. They are the simplest animals to have three embryonic germ layers, bilateral symmetry and cephalization |
| Acoelomates | meaning no coelom |
| Coelom | a fluid filled body cavity that is lined with tissue derived from mesoderm |
| Pharynx | a muscular tube near the mouth that helps pump food into the digestive cavity or gut |
| Flame Cells | specialized cells that remove excess water from the body |
| Ganglia | groups of nerve cells, that control the nervous system |
| Eyespot | group of cells that can detect changes in the amount of light in their environment |
| Fission | an organism splits into two and each half grows new parts to become a complete organism; asexual reproduction |
| Scolex | a structure that can contain suckers or hooks; head of the worm |
| Proglottids | the segments that make up most of the worms body |
| Pseudocoelom | meaning false coelom; cavity that is lined only partially with tissue derived from the mesoderm |
| Class Turbellaria | the class of free living planarians; most live in marine or fresh water and are bottom dwellers |
| Class Trematoda | the class of parasitic flukes; infect the internal organs of their host or even the blood of the host |
| Schistosoma Mansoni | a parasitic blood fluke; these flukes live in multiple hosts. |
| Class Cestoda | the class of parasitic tapeworms; adapted to the life inside the intestines of their hosts |
| Nemotoda | the phylum roundworms are grouped into |
| C. elegans | free living roundworm; its DNA was the first of any multi cellular animal's to be sequenced completely and feeds on rotting vegetation |
| Trinchina Worm (Trchinosis) | a disease formed from roundworms burrowing into organs and tissues causing cysts in muscles; can get it by eating raw or incompletely cooked pork |
| Filarial Worms (Elephantiasis) | a disease formed from roundworms when fluids within the lymph vessels get blocked causing swelling; transmitted by biting insects, mosquito |
| Ascarid Worms (Ascaris) | a disease formed from roundworms; absorb the host's digested food and can cause severe malnutrition; can be caused by not properly washed foods |
| Hookworms | a disease caused by roundworms; causes weakness and poor growth, these worms develop in the soil and attach to the host when touched; travel through the blood the the lungs and down to the intestines |
| Characteristics of Roundworm | unsegmented worms that have pseudocoeloms and digestive systems with two openings- mouth and anus |
Created by:
swingren
Popular Earth Science sets