Sperm production site. Coloured scanning electron micrograph (SEM) of a sectioned seminiferous tubule, the site of sperm production in the human testes. This tubule contains a swirl of the tails of forming sperm cells (pink) at its centre. The tubule is lined with a stratified epithelium containing two types of cell: Sertoli cells, which nourish developing sperm, and spermatogenic cells, from which the sperm cells form in a process known as spermatogenesis. After this, the sperm cells mature into their mobile form in a process known as spermiogenesis. Magnification: x360 when printed 10 centimetres wide.
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Creative#:
TPG31138721
Source:
達志影像
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RF
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