. An anatomical exposition of the structure of the human body . he Teriojfeum^.Human Body, are covered by a particular Membrane, of which that part Marrow aizlwhich belongs to the Scull, is termed Pericranium, and-that which covers wimlagmous-the Bones of the Face, or of the two Jaws, is calld fiinply Periofteum. ^^^^This Membrane fhall be more particularly defcribed among the other fofc parts of the Head. 358- 152 ANATOMY OF THE HUMAN 35S, The internal Strufture of the Bones of the Head being for themoft part cellulous, they contain alfo diRindt Portions of Marrow includedIn membranous
. An anatomical exposition of the structure of the human body . he Teriojfeum^.Human Body, are covered by a particular Membrane, of which that part Marrow aizlwhich belongs to the Scull, is termed Pericranium, and-that which covers wimlagmous-the Bones of the Face, or of the two Jaws, is calld fiinply Periofteum. ^^^^This Membrane fhall be more particularly defcribed among the other fofc parts of the Head. 358- 152 ANATOMY OF THE HUMAN 35S, The internal Strufture of the Bones of the Head being for themoft part cellulous, they contain alfo diRindt Portions of Marrow includedIn membranous Cells lying in the Diploe. 359, The Sinus Frontales, Maxillares, and Sphenoidales, are lined witha glandulous Membrane which fecretes a Mucilage very different from thatof the Joints, as we fliall fee in another place. 360. The true mucilaginous Glands of the occipital and maxillary Ar-ticulations, have nothing peculiar to them. They are proportioned to theJoints to which they belong, and lie between the capfular Ligaments andCircumference of the SECT III. A Defcription of the Mufcies. A R T. L the general DoSirine of the Mufcies. 3. A LL the Motions of the human Body, whether general or par- situation ;»/\ ticular, whether natural or preternatural, are immediately per- \ formed by Organs which Anatomifts name Mufcies ; and thefeare found in all the moveable parts of the Body. I do nothere fpeak of motions caufed meerly by the elafticity of certain parts,by external impulfes, or by the force of Gravity. 2, The Mufcies in general are bundles of Fibres of different figures Externaland fizes, and for the moft part confifting of two different portions •, one Cowformgwhereof is thick, foft, more or lefs red, and fometimes pale, forming ^•?what is called the body, flelhy fubftance or belly of the Mufcle. The other is thin and fmall, of a clofe contexture and very white, forming theExtremities and other parts termed by Anatomifts Tendons or Aponeurofes,The
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