In medicine, microbiology, cellular physiology and biochemistry a membrane is a thin layer that separates various cellular structures or organs. It usually includes lipid bilayer reinforced by proteins and other macromolecules, and can refer to:
- Basement membrane, the combination of the basal lamina and lamina reticularis or of two basal laminae
- Biological membrane
- Mucous membrane
- Serous membrane and mesothelium that surround organs, including:
- Skin, part of the integumentary system
Membrane may also refer to:
- A mechanical membrane, a thin, flat flexible part that can deform or vibrate when excited by an external force.
- Membrane keyboard
- Artificial, semipermeable membranes which are used to separate species in a fluid on the basis of size, charge or other characteristics. Such membranes are employed in a range of applications from water and wastewater treatment (see reverse osmosis, diffuser (sewage), landfill liners, nanofiltration, ultrafiltration and microfiltration) to hydrogen fuel cells (see proton exchange membrane).
- The Membranes - an English post-punk band
- Membranes also referred to as branes in string theory
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