• no body cavity
• bilaterial symetry
• cephalization
• diffusion
• pharyx

Planarian

• spade shaped
• 2 eyespots
• eat protozoans and scavenge
• hermaphodite
• reproduce by regeneration
• freeliving

Flukes

• parasitic
• suckers at both ends
• named 4 body they infect
• nervous and excretory systems like turbelliaria
• hermaphrodite
• complex life cycle

Tapeworms

• parasitic
• long ribbon like bodies
• feed off host nutrient hermaphrodite

• phylum Nematoda
• fluid filled body cavity
• slender boyd taper at ends
• mouth and anus
• free-livne or parasitic

• eats host's food
• blockes intestine
• reach 1 foot
• enter through contaminated water and food

• intestinal parasite
• feed on blood
• cause anemia
• cause slow development in children
• release eggs in feces
• Larvae burrow in feet
• lungs > cough > swallow > intestine

• infect people and mammals
• lice in intestine
• larvae form cysts in muscle
• infect when people eat undercooked meat
• cause stiffness and pain
• cause death
• rare in USA

• common parsite of humans
• don't cause serious disease
• 5-10 mm long
• in lower part of intestine
• come out at night to lay eggs

• most dangerous iun lymphatic system
• adults are 4 inches long
• vector is mosquito
• large number
• block vesseles
• servere cases cause elephantitits

• infect dogs and cats
• live in heart and lung arteries

• lives under skin in subutaneous fat
• vector day-biting deer and mango flies
• live in rainforest and African swamps
• tears flesh to drink blood