title: Membrane (disambiguation)
text: # Membrane (disambiguation)
  
  Membrane most commonly means a thin, selective barrier, but it is sometimes used for films that function as separators, like biological membranes. Membrane may also refer to:
  
  Biology:
  
  * Isolating tissues formed by layers of cells
     * Amnion, a membrane in the amniotic sac
     * Basement membrane, a thin sheet of fibers that underlies the epithelium
     * Chorioallantoic membrane, a vascular membrane found in eggs of birds, reptiles and other animals
     * Eardrum, more formally known as Tympanic membrane
     * Fetal membrane, the amnion and chorion which surround and protect a developing fetus
     * Mucous membrane, linings of mostly endodermal origin which are involved in absorption and secretion
     * Serous membrane, a smooth membrane consisting of a thin layer of cells, which secrete serous fluid
     * Tunic membrane, protective membrane covering the testes
     * Patagium, also known as "flight membrane", in some flying and gliding animals
     * Pterygium, a triangular membrane occurring in eyes
  * Cell membranes:
     * Plasma membrane, a membrane that separates the interior of all cells from the outside environment
     * Inner nuclear membrane, the biological membrane of nucleus
     * Outer membrane (disambiguation), several meanings
  
  Other uses:
  
  * Acoustic membrane, a thin vibrating layer that produces sound
     * Membranophone, a musical instrument that uses this principle, including most drums
  * Membrane keyboard, a computer keyboard whose keys are pressure pads that have only outlines and symbols printed on a flat, flexible surface
  * Membrane structure, a sort of spatial structure made of tensioned membranes
  * Membrane (M-Theory), a spatially extended mathematical concept that appears in string theory and related theories
  * Synthetic membrane, a synthetically created membrane which is usually intended for separation purposes in laboratory or in industry
  * The Membranes, a punk band
  