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The revolutionary discovery of the presence of spermatozoa in semen was made by Antonie van Leeuwenhoek (1632–1723), who in 1676 sent a letter (published in 1678) to the。

Sperm Morphology and Ultrastructure. A mature spermatozoon is a highly differentiated single cell that comprises head, midpiece and tail regions (Fig. 2A) all bounded。

The former perception of the spermatozoon as a delivery dspermatozoideevice of the male genome has been expanded to include a new understanding of the cells complex role in fertilization. Once the。

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We researched gas leak detectors to find the best ones for explosive gases like propane and methane, along with carbon monoxide, since they can occur with a。

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