Pengertian Sel

on 14 April 2008

Sel berasal dari kata 'cella' yang berarti ruangan berukuran kecil maka sel merupakan unit (kesatuan, zahrah) terkecil dari makhluk hidup, yang dapat melaksanakan kehidupan.
Ada empat teori tentang sel, yaitu:
- unit struktural terkecil makhluk hidup (Schleiden & T. Schwann)
- unit fungsional terkecil makhluk hidup (Max Schultze)
- unit pertumbuhan terkecil makhluk hidup (Rudolf Virchow)
- unit hereditas terkecil makhluk hidup (Penemuan akhir abad XIX)

Berdasarkan membran inti, sel dibagi menjadi 2, yaitu sel prokariotik dan sel eukariotik.

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