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 19 On the Bones of the Thorax

The substance of the pectoral bone

The substance of the pectoral bone is quite soft and spongy, 74 and is covered on its anterior surface by a more uninterrupted scale [pars ossea, substantia corticalis] than on its posterior; for the posterior scale has many foramina of different sizes which are not open at both ends but only provide access to vessels [arteria thoracica interna] (following A, A in fig. 2, Bk. 6) by which this bone is nourished. These foramina are more conspicuous in the first bone [manubrium sterni] to the same degree that the thickness of this bone exceeds that of the second [corpus sterni].



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 19 On the Bones of the Thorax