Ovulum
From Wikipedia, the free encyclopedia
From Wikipedia, the free encyclopedia
Ovulum ('parvum ovum') in spermatophytis (plantis semina ferentibus) est structura quae femineas cellulas reproductivas gignit et continet. In tribus partibus consistit: integumentis (quae laminas exteriores constituunt), nucello (vel reliquio megasporangii), et in media parte gametophyto femineo (ex megaspora haploidica genito). Gametophytum femineum—proprie megagametophytum appellatum—etiam saccus embryonicus in angiospermis appellatur. Megagametophytum ovum (aut nonnulla ova in nonnullis gregibus) ad fertilizationem apta gignit. Post fertilizationem, ovulum semen fit.
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Vicimedia Communia plura habent quae ad diagrammata ovulorum spectant. |
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Vicimedia Communia plura habent quae ad ovula spectant (Ovules, Ovule diagrams). |
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