sieve element sieve cell plant_anatomy PO:0025415 rwalls 2012-02-02T06:54:00Z PO_GIT:439 c&#233lula cribosa (Spanish, exact) A sieve element (PO:0025406) in which the sieve areas are not aggregated into sieve plates (GO:0097218). 師（篩）細胞 (Japanese, exact) Sieve areas in sieve cells generally have narrow pores and thin connecting strands, and they are not highly specialized, but instead are fairly uniform throughout the cell wall. Typical of gymnosperms and non-seed vascular plants such as ferns. Differ from sieve tube elements, which have sieve plates and more pronounced specialization of sieve areas.