Pseudocoelomate

Pseudocoelomate
("soo-do-see-lem-ate") A triploblastic protostome invertebrate that has a false coelom (fluid-filled body cavity).

Characteristics of Pseudocoelomates:

 * Lack a vascular system thus use diffusion
 * Hydrostatic skeletons and no segmentation
 * Body wall is usually covered by a secreted cuticle

Examples:

 * Nematoda

See also: Development & Tissues