Echinoderms
Published on Dec 03, 2015
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PRESENTATION OUTLINE
MOLLUSK. CEPHALOPOD- SOFT BODIES TENTACLES SIPHON WATER
- mollusk- have soft bodiesand a thick muscular foot some have shells and live on land
- and in water gastropod- some have lungs some havee gills all have a foot and a radula some have shells
- gills- some have gills an organ that filters dissolved oxygen h2o
- lungs- some have lungs an organ that absorbs oxygen from air
- Bivalve-hard shell with two matching halves
Photo by NOAA's National Ocean Service
SPONGES
- sponges - are the simplest invertebrates liven h2o they filterrs food from water
- sessile- means they live attached to onespot and do notmove
- larva- immature form- an early stage-of an organism that is always different from the parent
- flagella- tiny hairs that move h2o through a sponge
- Spicules- needle like spines reproduce- asexually sexually filter feed use specail cells to feed
Photo by Travis S.
ATHROPODS
- Jointed legs reproduce sexually
- Have a segmented body get oxygen through gills or air tubes
- Some have wings to help them fly
- Have exoskeleton
- Molting- when they shed their exoskeleton
Photo by Noodlefish
WORMS
- Have long tube like bodies divided into segments
- Have a true nervous system
- Take oxygen through their moist skin
- Found everywhere --- have muscles nerves and a diagestive system
- Aka annelids
Photo by justmakeit
ECHINDERMS
- Spiny skin have a water vascular system
- Live in ocean and or seas have tubed feet that move in water
- Arms extend outward
- Adults have radial symmetry
- Some move to feed others filter feed
