Fig. 5.
The Inferior and Internal Part of the Areola and Basis of the Pa∣pilla after Dissection from the Mamma.
A A, The Circumference of the Areola next the Mamma.
B B, The Mammary Glands plac'd under the Areola.
C C, The Lactiferous Tubes in their way to the Nipple.
The Arteries which convey Blood to the Mamma, are many small Branches, Springing from the Mammary and Intercostal Arteries; of these I told Six, which afforded a Flux of Blood without Pulsation in taking off a Schirrous Breast Here I cannot omit recommending to Pra∣ctitioners of Surgery the Tying of these Arteries; the doing of which is so easie, that it is hardly possible for One tollerably acquainted with the same Practice in taking off of Limbs, to be at a loss in this. The Trunks of these Arteries Arising from the Mammary and Inter∣costal Arteries, are very small, as they pass between the Pectoral Mus∣cle and Mamma, as appears from the Blood not having any Pulsation as it flows from them when divided in Living Bodies, except the Breast which was taken off is much Tumified. You must not expect to ful them with Wax by Injecting into the Aorta; because you are oblig d to raise the Sternum in order to Practice that Operation; whereby you cut off their Communication with the large Mammary Artery adjacent 〈…〉〈…〉; nor do's Wax commonly pass the Intercostal Arteries so far as to reach these. The Veins of the Mamma are Numerous, and pass on the Outside of the Mamma under the Skin only, and are very Conspicuous in those who give Suck, or have had Children: These Arise, or are continued from the Extremities of the Arteries and com∣posing many large Trunks which discharge their Blood into the Mam∣mary and Intercostal Veins; some pass up to the Subclavian Vein. The Nerves are commonly said to Arise from the Thoracick Nerves, and pass thro' the Intercostal and Pectoral Muscles to the Mamma: I must confess I never yet trac'd Them, nor do's Vieussemus Figure Them; but in his XXIV. Table Expresses Two Branches U, X, Arising from the Sixth and Seventh Nerves of the Neck composing one Trunk, which descends and gives Branches to the Musculi Serratus minor anticus, Pectoralis, Serratus major anticus, and to the Coverings of those Muscles: From the same Nervous Stock I am apt to think may also Spring some Branches passing to the Mamma, whence those pain∣ful Communications between the Mamma and Axilla may proceed. Besides these Vessels the Lymphe-Ducts of the Mamma are also men∣tion'd; I must confess I never yet saw these Ducts Arising from the Mamma, yet I can't doubt of their Existence on that Part, when I reflect on what Use they are of in General, in the Animal Oeconomy, of which elsewere. The Communication between the Lactiferous Tubes and Blood-Vessels, is demonstrated in the above mention'd Expe∣riment, by Injecting Mercury into the Former, and its Running out again by the Later. The Opinion that the Chyle is transmitted to the Mamma immediately from the Thoracick Duct is now altogether Ex∣ploded, and the last mention'd Experiment seems to evince the Milk to be deriv'd immediately from the Blood within the Mamma. It is evident, the Milk is not Transparent like other Liquors separated from the Blood, as the Saliva, Urine, Bile, &c. but by a Microscope it appears compos'd of Globules not unlike those of the Blood, except that the Globules of the Blood are somewhat larger than those of Milk.