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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.
What is Urethra, its Parts and Function. Resembling a tubular structure, it develops a connection between the urinary bladder and the genital organs in human body, as you can see in the urethra pictures. It is this canal, through which the transfer of excretory fluids occurs, that is ultimately emptied out of the body. The length of urethra varies greatly in feminine and masculine gender, as in the former, it is much shorter, while in the latter, it is comparatively longer.