[illustration]
P. 189
00 p. 155

The Twelfth Table.

Shews the Spinal Marrow whole taken out of its bony Den, and half taken from the Membrane cloathing it, being dissected, that the beginnings and productions of all the Vertebral Nerves might be seen together.

• A. A. The top of the Spinal Marrow, where it is cut off from its cleaving to the oblong Marrow.
• B. The Spinal Artery seen to descend through the whole Marrow, which however is made up of Arteries, brought into it from between the several joyntings of the Vertebrae.
• CC. The Spinal Nerve coming from the fifth or sixth Vertebrae of the Neck to the beginning of the wandring pair.
• D. D. Portions of the Membrane cloathing the Marrow dissected and rolled off.
• E. E. E. The Spinal Nerves sent out of the upper margine of the Marrow by bands, with which the like bundles also being carried from the lower margine, meet and joyn together all into one •…runk within the junct∣ures of the Vertebrae: then being separated again without them, they are carried into their respective Provinces.
• F. f. Nerves brought forth within the region of the Neck.
• G. g. Nerves destinated for the Shoulder and Arm, where both the Marrow is larger, and the bundles of the Nerves are greater.
• H. h. Nerves going out about the Back and Loyns: where both the body of the Marrow is again smaller, and the little bundles of the nerves are a little slenderer.
• I. i. Nerves destinated for the thighs, where also the medullar Body and the little bundles of the Nerves are again larger.
• K. Nerves going out of the Os Sacrum.