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, the costal cartilage, by the costochondral junction.

The bony part of the rib is subdivided into :

• The costal head

• The costal neck

• The costal body

• The costal tubercle

• The costal angle

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)