Phylum Nematoda Flashcards
What is the phylum for roundworms?
Nematoda
What does Nematoda mean?
thread
What is the symmetry?
bilateral symmetry
What is the body like?
Vermiform (resembling a worm in shape; long and slender)
Is it segmented?
unsegmented and pseudocoelomate
How is the body shaped?
body round in cross section and covered by a large layered elastic cuticle; molting usually accompanies growth in juveniles
How is the digestive tract? and mouth
Complete digestive tract; mouth usually surrounded by lips bearing sense organs
How is the excretory system?
Unique excretory system compromised of one or two renege cells or set of collecting tubules
What is the class that includes Ascaris?
Secernentea
What are the characteristics of Secernentea
paired glandular or sensory structures called phasmids in the tail region; similar pair of structures (aphids) poorly developed in anterior end; excretory system present; both free-living and parasitic species
What class includes Trichinella?
Adenophorea
What are the characteristics of Adenophorea?
Phasmids absent; most free-living, but some parasitic species occurs
