| CPSC | congenital paucity of secondary synaptic clefts [syndrome]; Consumer Products Safety Commission |
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| branchial clefts | A bilateral series of slitlike openings into the pharynx through which water is drawn by aquatic animals; in the walls of the cleft's are the vascular gill filaments that take up oxygen from the water passing through the cleft's; sometimes loosely applied to the branchial ectodermal grooves of mammalian embryos, which are imperforate, rudimentary homologues of complete gill clefts. Synonym: gill clefts. (05 Mar 2000) |
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| gill clefts | A bilateral series of slitlike openings into the pharynx through which water is drawn by aquatic animals; in the walls of the cleft's are the vascular gill filaments that take up oxygen from the water passing through the cleft's; sometimes loosely applied to the branchial ectodermal grooves of mammalian embryos, which are imperforate, rudimentary homologues of complete gill clefts. Synonym: gill clefts. (05 Mar 2000) |
| Maurer's clefts | Finely granular precipitates or irregular cytoplasmic particles that usually occur diffusely in red blood cells infected with the trophozoites of Plasmodium falciparum, occasionally those of P. Malariae; rarely observed in P. Falciparum blood smears because its trophozoites seldom are seen in peripheral blood. Synonym: Maurer's clefts. (05 Mar 2000) |
| Schmidt-Lanterman clefts | Funnel-shaped interruptions in the regular structure of the myelin sheath of nerve fibres, formerly interpreted as actual breaks in the sheath but shown by electron microscopy to correspond each to a strand of cytoplasm locally separating the two otherwise fused oligodendroglial (or, in peripheral nerves, Schwann cell) membranes composing the myelin sheath. Synonym: Lanterman's incisures, Schmidt-Lanterman clefts. (05 Mar 2000) |
| interneuromeric clefts | Cleft's between the neuromeric or segmental elevations in the primitive rhombencephalon. (05 Mar 2000) |
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