Here you will find defined terms that you may be unfamiliar with, to help you gain a better understanding of the scientific concepts that this website is portraying.

Coelom-body cavity (Hickman et al., 2007).

Desiccation- an excessive loss of moisture; the process of drying out (Medical Dictionary).

Lentic- environment of still waters, such as lakes or ponds (Free Dictionary).

Lotic- environment of moving waters, such as rivers or streams (Free Dictionary).

Mantle- soft extension of the body wall which secretes a shell (Hickman et al., 2007).

Metacercariae- fluke juvenile (cercariae) that has lost its tail and has become encysted (Hickman et al., 2007).

Odontophore- tooth-bearing organ in molluscs, including the radula, radular sac, muscles, and cartilages (Hickman et
al., 2007

Outcrossing- breeding individuals of different strains, but the same species (

Ovoviviparous- reproduction in which eggs develop within the maternal body without additional nourishment from
the parents and hatch within the parent or immediately after laying (Hickman et al., 2007).

Parthenogenesis- unisexual reproduction involving the production of young by females not fertilized by males
(Hickman et al., 2007).

Radula- rasping tongue used during feeding (Hickman et al., 2007).        

Torsion- a twisting phenomenon in gastropod development that alters the position of the visceral and pallial organs by 180° (Hickman et al., 2007).   

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