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Answer» Mammary glands: - In Prototheria, human beings and other primates, the mammary glands are modified apocrine sweat glands. In remaining mammals, they are modified compound alveolar sebaceous glands.
- Each mammary gland has a teat through which the mammary gland opens out. The area around the teat is darkly pigmented which is called as areola mammary.
- The mammary glands secrete the milk. The milk contains mainly carcinogen, lactoglobulin, lactoalbumin, lactose and fats. In human beings, there is a pair of mammary glands on the thorax.
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