Other Free Encyclopedias » Animal Life Resource » Jellyfish, Sponges, and Other Simple Animals » Secernenteans: Secernentea - Physical Characteristics, Behavior And Reproduction, Secernenteans And People, Canine Heartworm (dirofilaria Immitis): Species Accounts - GEOGRAPHIC RANGE, HABITAT, DIET, CONSERVATION STATUS

Secernenteans: Secernentea - Behavior And Reproduction

stages organs species females

The life cycle of secernenteans generally goes from fertilization (FUR-teh-lih-zay-shun), or the joining of egg and sperm to start development, in the females through four stages of young and into adulthood. The young worms that hatch from the eggs usually resemble adults except they are smaller and their sex organs are not yet mature. Each of the four stages of young is separated from one another by complete shedding of the outer body layer. Most species of secernenteans have males and females, but in some species male and female organs are in the same worm.

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