Platyhalminthies
Major life stages:
- born, they grow, they become full grown flatworms.
- They live in every habitat on earth
- Move using cilia and muscular undulations
- some flatworms have eye spots. they have a basic nervous system
- They scavenge for little bits of food, they have a gastrovacular cavity, and some are parasites feeding off of their hosts.
- diffusion
- Diffusion, no circulatory system
- Diffusion
- little flatworm
- platyhalminthies
- No major classes
- flat, some can grow to be very long, bilateral symmetry.
Nematoda
Major life stages:
- born, they grow, they become full grown Nematodes
- They live in every habitat on earth
- Move using muscular undulations
- basic nervous system
- They have a complete gut.
- diffusion
- Diffusion, they have a closed circulatory system
- Diffusion, and gills
- we did not dissect an organism.
- Nematoda
- No major classes
- they are small and known to terrorize Bikini Bottom when hungry or thirsty.
Annelid
Major life stages:
- born, they grow, they become full grown segmented worms.
- They live in every habitat on earth
- Move using longitudinal muscles and circular muscles alternate contracting movements to move.
- they have a well developed nervous system
- They have a complete gut. and range from filter feeders to predators.
- organs called nephridia help to remove ammonia waste.
- have a closed circulatory system
- Aquatic annelids have gills, land dwelling annelids use diffusion.
- We dissected an earthworm.
- Annelid.
- flat, some can grow to be very long, bilateral symmetry