sponges
DESCRIPTION
Sponges. Simplest animal Lives in salt water Two layers of cells. Coral, sea flowers, and Jellyfish. Live in ocean Have tentacles with stinging cells Float to move – trap food Coral stays in one place. Flatworms. Flat bodies Parasites Tapeworms most common. Round worms. Many species - PowerPoint PPT PresentationTRANSCRIPT
SpongesSimplest animalLives in salt waterTwo layers of cells
Coral, sea flowers, and Jellyfish Live in ocean Have tentacles with stinging cells Float to move – trap food Coral stays in one place
Flatworms Flat bodies Parasites Tapeworms most common
Round worms Many species Parasites Hook worms found in soil Round worms found in dirty water
Segmented worms Body is in segments – parts Earth worms – tunnel through soil Leeches – blood sucking – used in medicine
Spiny skinned Starfish, sea urchins, sea cucumbers, sand
dollars Starfish most well known, have tubed feet Starfish turn stomaches inside out to eat clams Starfish are not fish
mollusks Can live anywhere Most have shells and soft bodies Have muscular foot Snails, clams, octopus, squid
Arthopods Having joined legs –section bodies Ectoskeleton Largest group of invertebrates Includes insects,, centipedes, millipedes
arachnids , crustaceans
Insects 6 legs 3 body parts, head, abdomin, throax Most have wings, some 2 sets Pair of antenne on head
Arachnids 8 legs 2 body parts, head – body Spiders, ticks, horseshoe crabs
Crustaceans
Considered an acrahnid 8 legs, 2 body parts
Centipedes and millipedes Centipedes have one pair of legs per segment
they eat insectsMillipedes have two pair of legs per section
decomposers
Which one A or B is the millipede