The fifth is the Sternomohyoideus, that hath its beginning in the Bone of the Sternum on the inside and is inserted in the Root of the Os Hyoides, which it draws downward.
How many Muscles hath the Larynx?
There are fourteen, viz. four Common, and ten Proper. The first Pair of the Common is the Sternothyroideus or Bronchycus, which proceeding from the inside, and the top of the Sternum, ascends along the Cartilages of the Wind-Pipe, and is terminated in the bottom of the
Scutiformis or Buckler-like Cartilage, which it draws downward. The second is the Hyothyroideus, which ariseth from the Root of the Os Hyoides, and is inserted in that of the Scutiforme. This Muscle serves to lift up the Larynx, as also to dilate the bottom of the Scutiformis, and to close its top.
The first Pair of the Proper is the Cricothyroideus Anticus, which deriving its Original from the hinder and upper part of the Cricoides, or Ring-like Cartilage, is fixt in the upper and lateral part of the Scutiformis, to close or shut it up.
The second is the Thyroides.
The third is the Cricoarytenoideus Lateralis, which proceeds from the side of the Cricoides within, and is fasten'd to the bottom and side of the Arytenoides, which it removes to dilate the Mouth of the Larynx.
The fourth is the Thyroarytenoideus, which arising from the fore-part on the inside of the Scutiformis, is terminated on the side of the Arytenoides, to close the Orifice of the Larynx.
The fifth is the Arytenoideus, which having its Source in that place where the Cricoides is united to the Arytenoides is inserted in its upper and lateral part, to close the Larynx.
How many Muscles hath the Pharynx?