CHAP. XV. The division of the Arteries.
THe Artery arising forth of the left ventricle of the heart, is presently (the two Coronall arteries being first spred over the substance of the heart) divi∣ded into two unequall branches. The greater whereof descends to the lower parts, being distributed, as we formerly mentioned in the third Booke, and * 1.1 22. Chapter. The lesser ascending to the upper parts, is againe divided into two o∣ther unequall branches, the lesser of which ascending towards the left side, sends forth no artery from it, untill it arive at the first rib of the Chest, where it produces the subclavian artery, which is distributed after the manner following.
First, it produces the intercostall, and by it imparts life to the three intercostall muscles of the foure upper ribs, and to the neighbouring places.
Secondly, it brings forth the Mammillary branch, which is distributed as the Mammillary veine is.
Thirdly, the Cervicalis, which ascends along the necke by the transverse produ∣ctions * 1.2 to the Dura mater, being distributed as the vena cervicalis is.
Fourthly, passing out of the Chest, from the backe part of the Chest, it sends * 1.3 forth the musculosa, whereby it gives life to the hinde muscles of the necke, even to the backe part of the head. * 1.4
Fiftly, having wholy left the Chest, it sends forth the two Humerariae, or shoulder arteries, the one whereof goes to the muscles of the hollow part of the shoulder * 1.5 blade, the other to the joint of the arme and the muscles situate there, and the gib∣bous part of the shoulder blade. * 1.6
Sixthly and lastly, it produces the Thoracica, which also is two fold, for the one goes to the fore muscles of the Chest, the other to the Latssimus, as we said of the veine, the remnant of it makes the Axillaris of that side.
The other greater branch likewise ascending by the right side, even to the first ribbe of the Chest, makes also the subclavian of that side, which besides those divi∣sions it makes on this side, like those of the left side, hath also another which makes the right and left Carotides or sleepy arteries, which ascending undivided with a nerve of the sixth conjugation and the internal jugular veine, by the sides of the As∣pera Arteria or windpipe, when they come to the Pharinx, they are divided on each side into two branches, the one internall, the other externall. The internall and grea∣ter