There are generally ten, five on each side, that is to say, two _Obliqui_, one ascending, and the other descending; one _Transversus_, one _Rectus_, and two Pyramidal, of which last, nevertheless, there is sometimes only one, and sometimes none at all. {35} The _Obliquus Descendens_, which is the first, hath its Original by digitation in the sixth and seventh of the true Ribs, in all the spurious Ribs, and in the transverse _Apophyses_ of the _Vertebra's_ of the Loins, and comes near to the _Serratus Major Anticus_ of the Breast; from whence it proceeds to the external Rib of the _Os Ilion_, and is terminated by a large _Aponeurosis_ in the _Linea Alba_ or _White Line_, which separates the Muscles that are on each side of the _Abdomen_ or lower Belly. The _Obliquus Ascendens_ ariseth from its Source in the upper part of the _Os Pubis_, and in the Ridge of the Hip-Bone, till it cleaves to the _Apophyses_ of the _Vertebra's_ of the Loins in the Extremities of all the Ribs, and in the _Xiphoides_ or Sword-like Cartilage, and is terminated in the White Line by a large _Aponeurosis_. The _Rectus_ being situated between the _Aponeuroses_ of the _Obliquus_, takes its rise in the Cartilages of the Ribs, in the _Xiphoides_ and the _Sternum_, and enters into the _Os Pubis_, having many nervous parts to corroborate it in its length. The _Transversus_ having its beginning in the transverse _Apophyses_ of the _Vertebra's_ of the Loins, is fasten'd to the internal Rib of the _Os Ilium_, and within the Cartilages of the lower Ribs, and is terminated by a large _Aponeurosis_ in the _Linea Alba_, passing over the _Rectus_, and sticking to the _Peritonæum_. The Oblique Muscles, and the Transverse, have Holes toward the Groin, to give Passage to the Spermatick Vessels of Men, and to a round {36} ligament of the _Matrix_ in Women; so that Ruptures or Burstenness happen through these parts in both Sexes, although the Holes of these three Muscles are not situated one over-against another. The Pyramidal, so named by reason of its Figure, is situated in the lower _Tendon_ of the _Rectus_, its Origine being in the upper and external part of the _Os Pubis_; but it is terminated in the White Line, three Fingers breadth above the _Pubes_, and sometimes even in the Navel itself. These Muscles are not found in all Bodies for there are sometimes two, sometimes only one, and sometimes none. The use of the Muscles of the lower Belly is to compress all the contain'd parts, in order to assist them in expelling the Excrements. _How many Muscles are there in the Testicles?_ They have each of them one, call'd _Cremaster_; this Muscle takes its rise from the Ligaments of the _Os Pubis_, and by the dilatation of its Tendon covers the Testicle, which it draws upward. _How many Muscles hath the _Penis_?_