Phylum Nematoda Flashcards
Common characteristic of pseudocoelomate
Pseudocoelom
Eutely
Complete digestive tract
______ & _____ do not have a complete digestive tract
Acanthocephalans
Nematomorphs
A space b/w gut and mesodermal components of body wall
Pseudocoelom
It is spacious, fluid filled that contains visceral organs
Pseudocoelom
Body composed of a constant number of somatic cells in adults
Eutely
It is a common characteristic that has mouth and anus
Complete digestive tract
3 mosquitoes that transmit filarial worm
Aedes
Anopheles
Culex
Organs system present in pseudocoelom
Digestive
Excretory
Nervous
Reproductive
Organ-system absent in pseudocoelom
Circulatory
Respiratory
This are roundworms
Phylum nematoda
How many species are there in phylum nematoda
12,000 species
They are cylindrical bodies and most are dioecious
Phylum nematoda
Phylum nematoda eat
Every type of organic material
Rotting, living tissue
It is a human parasite (small intestine) which is up to 30 cm long and found in SE US
Ascaris lumbricoides (underline)
Female ascaris lumbricoides lay
200,000 eggs/day
Most common parasite in the US found in the large intestine
Pinworms
They lay eggs in anus at night and spread through fecal oral route
Pinworms
Elephantiasis are caused by
Wuchereria bancrofti (underline)
They kibe in lymphatic system and obstruct lymph to cause swelling
Filarial worm
It is a dog heartworm which is transmitted by aedes
Hookworms
It causes trichinosis
Trichinella
A free living nematode that has 959 cells
C elegans (Caenorhabditis elegans) underline
“Genetic regulation of organ development and programmed cell death”
Noble prize (2002)
Brenner, Sulston and Horvitz
Rota
Wheel
Fera
Bearer
Ciliated crown
Corona
Mostly microscopic and 1800 species (dioecious)
Phylum rotifera
This is aquatic and protonephridia with flame cells
Phylum rotifera
