http//www.ucmp.berkeley.edu/phyla/ecdysozoa/nemat oda.html 12 Reproductive system
Reproduction is usually sexual.
Involves internal fertilization.
Female may deposit 100000 or more fertilized eggs per day.
Zygotes are resistant cells and can survive harsh conditions.
Females are larger than males
13 Gas Exchange
Gas exchange occurs through diffusion.
Some parasitic nematodes have a form of hemoglobin in the body fluids.
Anaerobic and Aerobic metabolism is also common.
http//entomology.ifas.ufl.edu/creatures/nematode/ marine_nematodes.htm 14 Unique Features
Trichinella (a type of nematode) has been dubbed animals that act as viruses because they invade muscle cells and control genes which code for proteins which make cellselastic enough to house nematodes.
The Cuticle which is a hard exterior that the worm sheds and excretes as it grows.
Resulting from the folding of the mesoderm.
How do the nematoda use there musculature for motion differently from the others
What is the skeletal system called What does this mean
Why are some nematodes called animals that act like viruses
Which type of symmetry do nematodes exhibit How can you tell
Nematoda have longitudinal muscles that they contract rapidly and create a thrashing motion.
They have hydrostatic skeletal systems that react to the environment and the pressure that is exerted upon them
Some have learned to control the muscles of humans in order to receive the nutrients they need to survive.
The nematodes have radial symmetry that can be proven by the fact that they can be cut anyway through the central axis to create mirror images.
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