nematoda Flashcards
nematoda
roundworms
roundworms
most numerous of all animals
slender
unsegmented with tapering ends
some are parasitic
how big are roundworms
microscopic to 1 metre
where do roundworms live
polar regions to ropic regions free living in soil and aquatic areas
how many germ layers do roundworms have
3
what kind of coelom do round worms have
pseudocoelom
pseudocoelom
body cavity only partially lined with mesodermal tissue
“false coelom”
what kind of body plan do round worms have
tube within a tube
inner tube of a round worm
digestive tract
outer tube of roundworm
body wall
how do roundworms eat
grasping mouth parts and spines to catch prey
where do roundworms live
soil and aquatic , algae fungi, detrius
what do round worms use diffusion for
breathing, excretion they do not have circulation
nervous system in round worms
ganglia
how do roundworms move
muscles extend through the body using hydrostatic skeleton
how do round worms reproduce
sexual reproduction they have seperate genders parasitic worms have more than 1 host
types of roundworms
trichinosis causing worms filariel womrs hookworms and ascarid worms
trichinisis worms
female burrow into intestinal walls and release egrgs larvae travel into organs and tissues larvae forms a cyst then goes dormant until host is eaten
filariel worms
transmitted through bites causes elephant people
ascarid worms
causes malnutrition
hookworms
eggs hatch in soil and ebter unprotected feet then into bloodstream and lungs
