Book One -- The things that sustain and support the entire body, and what braces and attaches them all. [the bones and the ligaments that interconnect them] | Chapter 9 On the Twelve Bones of the Upper Maxilla, Including the Bones of the Nose

The fifth bone of the maxilla

The fifth bone (C in figure 1) [os nasale] of the upper maxilla is one of the two bones of the nose: a hard, solid, broad, thin, elongated little bone resembling a quadrangle more than a triangle. At its upper part (Y to Z in fig. 1) it does not end at a sharp angle, but is so blunt that it has two angles there. It is ended at that point by a suture [sutura frontonasalis] separating the frontal bone from the upper maxilla. The outer side of the bone has a suture [sutura nasomaxillaris] (from Y to e in fig. 1) that it shares with the fourth maxillary bone, running steeply downward along the side of the nose the entire length of this fifth maxillary bone; it is much shorter in humans than in dogs and monkeys. The inner side of the bone (from Z to f in figure 1), where it is joined to its mate, has a suture [sutura internasalis] not unlike a harmonia, common to both bones of the nose. This suture begins 41 between the brows [glabella], from the suture [sutura frontonasalis] common to the frontal bone and the upper maxilla and extends straight down the length of the bones of the nose. Below (from f to e in figure 1), the fifth bone is not interrupted by a suture, nor is it joined to another bone, but like its mate it is rough and uneven, and ends in cartilage (K and L in the 4th table of muscles) 42 that continues downward, becoming softer the farther it runs toward the tip of the nose. We shall talk about this cartilage separately with the remaining cartilages of the nose and the entire body, following the account of the bones.



Book One -- The things that sustain and support the entire body, and what braces and attaches them all. [the bones and the ligaments that interconnect them] | Chapter 9 On the Twelve Bones of the Upper Maxilla, Including the Bones of the Nose