A skeletal system composed of fluid held under pressure in a closed body compartment; the main skeleton of most cnidarians, flatworms, nematodes, and annelids.
hydroxyl group ...
hydrostatic skeleton a water-based skeleton present in many animals (such as the earthworm) that lack structures, such as bone, for muscles to pull against.
hypothalamus the portion of the forebrain that serves as the control center for hunger, thirst, body temperature, and blood pressure.
hydrostatic skeleton . A mass of fluid or plastic parenchyma enclosed within a muscular wall to provide the support necessary for antagonistic muscle action; for example, parenchyma in acoelomates and perivisceral fluids in pseudocoelomates serve as hydrostatic skeletons.
The noncompressible fluid of the body cavity can function as a hydrostatic skeleton against which muscles can work.
The presence of a cavity enables the internal organs to grow and move independently of the outer body wall.
Taxonomy: analogous, binomial nomenclature, biodiversity, ectothermic, taxonomy, exoskeleton, hydrostatic skeleton, invertebrate, vertebrate, analogous structures, class, family, genus, Linnean taxonomy, order, phylum, species, subspecies ...
Locomotion is generally brought about by a system of muscles in conjugation with a skeleton. The skeleton may be an endoskeleton, an exoskeleton or a hydrostatic skeleton. The support system will be adapted to methods of locomotion for a particular animal (e.