Transcript Echinoderms

Echinoderms
1. What is the structure of echinoderms?
2. have endoskeletons
2. radial symmetry
3. central disk with arms around it
2. water vascular system
3. system of fluid filled tubes
3. help it move and get food
4. tube feet – suction cups
2. feeding and digestion
3. use tube feet to pry open shells
3. push stomachs out of mouth
3. sea urchins use teethlike plates to
scrape algae
3. sea cucumbers use mucus covered
tentacles
2. reproduction
3. sexual
4. female sheds eggs and male sheds
sperm into water
3. regeneration
4. sea stars
1. What are some different echinoderms?
2. sea stars
3. 5 arms around a central disk
3. spiney skin
2. brittle stars
3. 5 arms; very thin and flexible
3. no tube feet; move by rowing
themselves
2. sea urchins/sand dollars
3. burrow into sand or rocky areas
3. the shell is called the test
4. tube feet extend through pores
2. sea cucumbers
3. outer bodies appear leathery
3. tentacles have mucus
4. draw trapped food into mouth
3. have respiratory organs
4. respiratory trees – branched tubes
3. when threatened can cast out body
organs through anus