The ribs
Costae
Thirteen pairs. The first nine reach the sternum each by its own cartilage; the last four do not, and the last pair floats.
- Region
- Trunk
- Members
- 13
- With a page
- 2
How they differ along the set
What changes from one end of the series to the other, which is most of what there is to know about any one of them.
- The cat has thirteen pairs of ribs.Reighard & Jennings 1901, the ribs
- The first nine are true ribs, each joined to the sternum by its own costal cartilage.Reighard & Jennings 1901, the ribs
- The last four are false ribs, not joined to the sternum separately; the thirteenth costal cartilages are free, so the thirteenth pair floats.Reighard & Jennings 1901, the ribs
- They lengthen to the ninth, the ninth and tenth being of the same length, and shorten again to the last.Reighard & Jennings 1901, the ribs
- The first stands nearly upright; the others lean forwards at their upper ends.Reighard & Jennings 1901, the ribs
- The tubercles grow less prominent going back, and are absent on the last two or three ribs.Reighard & Jennings 1901, the ribs
- Along each rib the borders are broad above and narrow below, and the surfaces narrow above and broad below.Reighard & Jennings 1901, the ribs
The members
In order along the set. Any one of them can be singled out in the model above, with the picker beneath it. The ones that are taught by name have a page of their own.