What is a Nail?
The Nails are a Continuity of the Skin harden'd at the end of the Fingers, to strengthen and render them fit for Work.
C H A P. IV.
Of the general Division of a Humane Body.
How is the Humane Body divided before it is dissected, in order to Anatomical Demonstration?
Some Anatomists distinguish it into Similar and Dissimilar Parts, appropriating the former Denomination to all the simple Parts of the Body taken separately, as a Bone, a Vein, a Nerve, &c. but they attribute the Name of Dissimilar to all those Members that are compos'd of many Similar or Simple Parts together; such are the Arms,
Legs, Eyes, &c. wherein are contain'd all at once, Bones, Veins, Nerves, and other parts.
Others divide it into containing and contained Parts, the former enclosing the others, as the Skull includes the Brain, and the Breast the Lungs; whereas the contained Parts are shut up within others; as the Entrails within the Belly, the Brain within the Skull, &c.
Others again divide the whole Body into Spermatick and Sanguineous Parts; the former being those which are made at the time of Formation; and the latter all those that are grown afterward by the Nourishment of the Blood.