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What is inside the male testes?

Dr. Mehmet Oz, MD
Cardiology (Cardiovascular Disease)

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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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.