MAMMARY GLAND
\mˈaməɹi ɡlˈand], \mˈaməɹi ɡlˈand], \m_ˈa_m_ə_ɹ_i ɡ_l_ˈa_n_d]\
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In humans, either of the mammary glands, consisting of fibrous tissue connecting the lobes and fatty tissue in between the lobes.
By DataStellar Co., Ltd
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is the secretory organ of the milk. It is situate in the substance of the breast, to which it gives shape. The tissue of this gland results from the assemblage of lobes of different size, united intimately by a dense areolar tissue. Each of these is composed of several lobules, formed of round granulations, of a rosy white colour, and of the size of a poppy seed. The glandular grains give rise to the radicles of the excretory canals of the mamma, which are called galoctophorous or lactiferous. These excretory vessels unite in ramusculi, rami, and in trunks of greater or less size; collect towards the centre of the gland; are tortuous, very extensible, and semi-transparent. All terminate in sinuses, situate near the base of the nipple, which are commonly from 15 to 18 in number. These sinuses are very short, conical, and united by areolar tissue. From their summits, a fasciculus of new ducts sets out, which occupy the centre of the nipple and open separately at its surface. The arteries of the mammary gland come from the thoracic, axillary, intercostal, and internal mammary. The veins accompany the arteries; the nerves are furnished by the intercostals, and brachal plexus; the lymphatic vessels are very numerous, and form two layers. They communicate with those of the thorax, and pass into the axillary ganglions.
By Robley Dunglison
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