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What are breasts composed of?

Breasts are glands contained within the front of the chest wall. The average breast weighs between seven and 10 ounces and is primarily composed of 12 to 20 lobes that spread out from the nipple like the spokes in a bicycle tire. These triangular lobes each have one central duct that opens at the nipple, through which milk exits.

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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.