C H A P. VI.
Of Myology, or the Anatomy of the Muscles of a Humane Body.
What is a Muscle?
It is the principal Organ or Instrument of Motion; or it is a Portion of Flesh, wherein there are Veins, Arteries, Nerves, and Fibres, and which is cover'd with a Membrane.
How many parts are there in a Muscle?
Three, viz. the Head, the Belly, and the Tail: The Head is that part thro' which the Nerve enters; the Belly is the Body or Middle of the Muscle; and the Tail is the Extremity, where all the Fibres of the Muscle are terminated to make the Tendon or String which is fasten'd to the Part whereto it gives Motion.
Have all the Muscles their Fibres streight from the Head to the Tail?
No, some have them streight, others transverse, and others oblique or circular, according to the several Motions to which they are appropriated.
How many sorts of Muscles are there with respecting to their Action?