Rib

The rib ("os costale" in latin) is the bony dorsal part of the whole rib ("costa" in latin), separated with the ventral cartilagenous part of the rib by the costochondral junction.

The bony part of the rib is subdivided into :

• A head with an articular facet

• A neck

• A body (shaft) including the tubercle, the costal angle and the knee of the rib

The number of ribs differ between species:

• Carnivores: 12-14 (9 sternal, 4 asternal)

• Dogs: 13 (9 sternal, 4 asternal)

• Pigs: 13-16 (7 sternal, 7-8 asternal)

• Ruminants: 13 (8 sternal, 5 asternal)

• Horse 18 (8 sternal, 10 asternal)