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membrane US English

A pliable sheetlike structure acting as a boundary, lining, or partition in an organism

membrane US Thesaurus

the sensitive membranes in the mouth

cell membrane US English

The semipermeable membrane surrounding the cytoplasm of a cell

unit membrane US English

A lipoprotein membrane that encloses many cells and cell organelles and is composed of two electron-dense layers enclosing a less dense layer

mucous membrane US English

An epithelial tissue that secretes mucus and that lines many body cavities and tubular organs including the gut and respiratory passages

plasma membrane US English

A microscopic membrane of lipids and proteins that forms the external boundary of the cytoplasm of a cell or encloses a vacuole, and that regulates the passage of molecules in and out of the cytoplasm

serous membrane US English

A mesothelial tissue that lines certain internal cavities of the body, forming a smooth, transparent, two-layered membrane lubricated by a fluid derived from serum. The peritoneum, pericardium, and pleura are serous membranes

basement membrane US English

A thin, delicate membrane of protein fibers and glycosaminoglycans separating an epithelium from underlying tissue

basilar membrane US English

A membrane in the cochlea that bears the organ of Corti

hyaloid membrane US English

A thin transparent membrane enveloping the vitreous humor of the eye

tympanic membrane US English

A membrane forming part of the organ of hearing, which vibrates in response to sound waves. In humans and other higher vertebrates it forms the eardrum, between the outer and middle ear

vitelline membrane US English

A transparent membrane surrounding and secreted by the fertilized ovum, preventing the entry of further spermatozoa

nictitating membrane US English

A whitish or translucent membrane that forms an inner eyelid in birds, reptiles, and some mammals. It can be drawn across the eye to protect it from dust and keep it moist

hyaline membrane disease US English

A condition in newborn babies in which the lungs are deficient in surfactant, preventing their proper expansion and causing the formation of hyaline material in the lung spaces

arachnoid US English

Like a spider or arachnid


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