karyotheca


karyotheca

 [kar″e-o-the´kah] the nuclear membrane.

nu·cle·ar en·ve·lope

the double membrane at the boundary of the nucleoplasm; it has regularly spaced pores covered by a disclike nuclear pore complex and a space or cisterna about 150 Ǻ wide between the two membranes; the outer membrane is continuous at intervals with the rough endoplasmic reticulum. Synonym(s): caryotheca, karyotheca, nuclear membrane