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In the cell membrane, hydrophilic heads orient to the inside and outside of the membrane, with the hydrophobic molecules inside. This gives the membrane its semi permeable fluid nature.he hydrophilic region in the cell is water-loving and it  attracts the water molecules. It is basically composed of polar  groups which readily dissolve and absorb water.
A hydro skeleton, also called hydrostatic skeleton, occurs in many soft-bodied animals, such as earthworms. A hydro skeleton is not bony, but rather is a cavity filled by pressurized fluid.The noncompressible fluid of the body cavity can function as a ~ against which muscle s can work.ypertension High blood pressure; blood pressure consistently above 140/90. hydrostatic skeleton. (hy-droh-stat-ik). 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 ...