Question

Male Reproductive System

What is inside the male testes?

A Answers (1)

  • AMehmet Oz, MD, Cardiology (Cardiovascular Disease), answered

    The source of sperm and testosterone - the testes - are filled with tubules that look like cooked spaghetti. If these seminiferous tubules from each testicle were stretched out, they'd create a string three feet long (please don't try this yourself). At age 50, tubules begin to narrow due to thickening of connective tissue within tubules, and sperm production decreases, but sperm never lose viability (the oldest father on record was 94).

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