Fig. 15.
Represents (according to Bidloo) a System of the Arteries injected with Wax, and free'd from the Body of an Infant Six Months Old; which he tells us he has reserved: If so, it is a great Rarity indeed! For having more than once free'd the Arteries from the Body of an Infant, as well as from an Adult, and finding them far differing from this Figure, and not much disagreeing with the Descriptions and Fi∣gures of Vesalius and others; I cannot look on this, but as a Prodigy in Nature. Wherefore I shall here give you his Description of it, and refer you to my Appendix. Fig. 3. Where their common Ap∣pearance is exprest, as I now have them injected by me, and dissected from the Body of an Infant.
The Arteria Aorta (say's Bidloo) arising from the Heart, soon sends out Two small Coronary Branches. B, in the Body of the Heart. Its Trunk is divided on the Pericordium into the Ascendens C, and Descendens D. The First gives Branches to the Parts above the Heart, and is divided into the Subclavii E, from which the Axillares F, and Internal Mammary G, Three or Four Intercostales H, and Cervicales I. do arise. From the Axillary Artery are Branches com∣municated to the Scapula K, and to the Superior Parts of the Thorax. When it has got between the Muscles of the Cubit, it is divided into Two little Branches; the First of which L, goes to the Wrist, Thumb, and Fore-Finger; the other to the Three other Fingers. It divides into Two about the Thymus, and Forms the Carotides M. These ascen∣ding near the Wind-pipe after having sent several Branches to the Tongue, Larynx and Parts adjacent, and are divided into the Exter∣nal N, and Internal Branch O, the Exterior supplies the Face, Lips, partly the Ear and lower Teeth; the other Branch serves the Forehead, Temples and Neighbouring Parts.
The Inward Branch ascending streight through the Os Sphoenoides creeps under the 'Dura Mater, and forming various Plexus's, in that Part within the Skull, it is cover'd with a particular Coat already de∣scrib'd; it sends out small Branches near the Optick Nerves; but the large Trunks creep back again, sometimes united and by and by se∣parated from each other. There are small Branches convey'd to the Spinal Marrow, partly above and partly below the Heart. From the Axillarie's, and ascending and descending Trunks, it derives several Branches which reflected into a Circle, creep through its Coverings and several Parts of the Head. The descending Trunk of the Aorta D, supply's some of the Intercostals 1, and the Neighbouring Muscles and Parts; there is a large Trunk 2, also sent to the Diaphragm; under the Diaphragm the Branches of the Viscera of the Abdomen are re∣markable. viz. of the Stomach, 3. The Inferior and Superior Me∣seraic Branches, 4, 5, those of the Omentum, or Caul, 6, of the Liver, 7, of the Kidneys 8, the Spermatics 9, and so on. About the Os Sa∣crum this Trunk is divided into Two Branches, from which others are again deriv'd to the Right Gut and Pudenda, some to the Hips, some to the Thighs and Legs, as well Internally, as Externally. Thus much concerning the principal Distribution of the Aorta.
In the next Place Professor Bidloo gives us the Anatomy of the Blood. In the Anatomy of the Blood Chymically performed (say's he) it is manifest there is a Water in it, which as well as it can be, is simply to be considered) a Spirit and Salts both fixt and volatile. Tho' by this Method (he very well say's) some Parts are very accurately disco∣ver'd; yet doth it exceedingly destroy the Appearances of some Figures, which ought by no means to be alter'd; wherefore he proposed the following Figure.