When did lazzaro spallanzani contribution to the cell theory

The development and refinement of microscopy in the 17th century revealed to science a whole new world of microorganisms, until then unknown, that appeared to arise spontaneously, and fuelled a controversy that had seemed definitively resolved by Francesco Redi's experiments, the question of the spontaneous generation and origin of life. At the half of the 18th century a young Italian abbot, Lazzaro Spallanzani, Professor of Physics and Mathematics at the University of Reggio Emilia, started repeating the experiments of John Turberville Needham. The English Catholic priest claimed to have demonstrated the validity of the theory of spontaneous generation after observing the growth of small organisms in some chicken broth placed in sealed flasks and heated for 30 minutes. Spallanzani found significant errors in the experiments conducted by Needham and, after trying several variations on them, disproved the theory of spontaneous generation.

Italian priest, biologist and physiologist

"Spallanzani" redirects here. For other uses, see Spallanzani (disambiguation).

Lazzaro Spallanzani (Italian pronunciation:[ˈladdzarospallanˈtsaːni]; 12 January 1729 – 11 February 1799) was an Italian Catholic priest (for which he was nicknamed Abbé Spallanzani), biologist and physiologist who made important contributions to the experimental study of bodily functions, animal reproduction, and animal echolocation.^[2] His research on biogenesis paved the way for the downfall of the theory of spontaneous generation, a prevailing idea at the time that organisms develop from inanimate matters, though the final death blow to the idea was dealt by French scientist Louis Pasteur a century later.

His most important works were summed up in his book Experiencias Para Servir a La Historia de La Generación De Animales y Plantas (Experiences to Serve to the History of the Generation of Animals and Plants), published in 1786. Among his contributions were experimental demonstrations of fertilisation betw

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