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A functional mammary gland is characteristic of all female mammals. The glandular tissue of each breast is divided into ____A____containing clusters of cells called alveoli. The cells of alveoli secrete milk, which is stored in the cavities (lumens) of alveoli. The alveoli open into____B____ . The ____B____of each lobe join to form a ____C____. Several ____C____join to form a wider____D____ which is connected to ____E____through which milk is sucked out.
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| A | B | C | D | E |
| 15-20 | mammary tubules | mammary duct | mammary ampulla | lactiferous duct |
Mammary glands are modified sweat glands and characteristics of mammalian females. In human males it is a vestigial organ. The mammary glands are paired structures (breasts) that contain glandular tissue and a variable amount of fat. The glandular tissue of each breast is divided into 15-20 mammary lobes containing clusters of cells called alveoli. The cells of alveoli secrete milk, which is stored in the cavities (lumens) of alveoli. The alveoli open into mammary tubules. The tubules of each lobe join to form a mammary duct. Several mammary ducts join to form a wider mammary ampulla which is connected to lactiferous duct through which milk is sucked out.
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