None of the horse breeds have only one pair of ribs. There is, however, a breed of horse that has one LESS set of ribs than all other breeds -- the Arabian Horse.
According to Ross and Wilson Anatomy and Physiology, 2 pairs
The true ribs (pair 1-7) are connected to the sternum by way of the costal cartilages, a type called hyaline. Pair 8-10 are called floating ribs and they also attach to the sternum but use the same cartilage as 7.
The 7th pair of ribs are the longest. The ribs increase in length from 1-7. From 8-12 they decrease in length.
trapezoid
Three types of ribs we have are True ribs, False ribs, and Floating ribs.
It is a trapezoid that has only 1 pair of parallel sides of different lengths
The order of ribs from superior to inferior is: True ribs (1-7) False ribs (8-10) Floating ribs (11-12)
1 pair:m.sternohyoideus 2 pair: m.thyreohyoideus 3 pair : m.omohyoideus 4 pair. m.sternothyreoideus
The "true" ribs are the first 8 ribs of the horse's rib cage (there are 18 total ribs). They are the true ribs because the attach to both the vertebrae above them and the sternum below. I found this in a book-Chapter 35 of Saddles by Russel H. Beatie. Hope this helps.
The chest of a human body consists of the heart, lungs and ribs to protect both vital organs. Ribs 1-7 are commonly called the true ribs.
a trapezoid
It WASN'T 3 meters it was 8 feet 1 1/4inches, or 2.47 meters!The name of the horse was Huaso.