closing membrane
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Membrane potential — Differences in concentration of ions on opposite sides of a cellular membrane lead to a voltage called the membrane potential. Many ions have a concentration gradient across the membrane, including potassium (K+), which is at a high inside and a… … Wikipedia
membrane — 1. A thin sheet or layer of pliable tissue, serving as a covering or envelope of a part, as the lining of a cavity, as a partition or septum, or to connect two structures. SYN: membrana [TA]. 2. SYN: biomembrane. [L. membrana, a skin or m … Medical dictionary
pit membrane — noun Etymology: pit (I) : a membrane of a plant pit that consists of primary wall and middle lamella and that closes the pit externally called also closing membrane; compare torus … Useful english dictionary
cloacal membrane — n a plate of fused embryonic ectoderm and endoderm closing the fetal anus * * * the thin, temporary barrier between the hindgut and the exterior, formed by the endoderm of the hindgut and the ectoderm of the cloaca of the embryo; its dorsal part… … Medical dictionary
secondary tympanic membrane — n a membrane closing the round window and separating the scala tympani from the middle ear * * * membrana tympanica secundaria … Medical dictionary
secondary tympanic membrane — noun : a membrane closing the cochlear fenestra and separating the scala tympani from the middle ear … Useful english dictionary
cloacal membrane — noun anatomy : a plate of fused ectoderm and endoderm closing the fetal anus in the vertebrate embryo … Useful english dictionary
epiphragm — noun Etymology: Greek epiphragma covering Date: circa 1854 a closing membrane or septum (as of a snail shell or a moss capsule) … New Collegiate Dictionary
pharyngeal pouch — n any of a series of evaginations of ectoderm on either side of the pharynx that meet the corresponding external furrows and give rise to the branchial clefts of the vertebrate embryo * * * (branchial pouch, visceral pouch) any of the paired… … Medical dictionary
nervous system — Anat., Zool. 1. the system of nerves and nerve centers in an animal or human, including the brain, spinal cord, nerves, and ganglia. 2. a particular part of this system. Cf. autonomic nervous system, central nervous system, peripheral nervous… … Universalium
