VAN 111: Veterinary Gross Anatomy - I (1+2)

INTERPARIETAL BONE

Ox

• It is single bone located in the postero-superior part of the cranium.
• It is paired in the fetus; wedged in between the parietals above and the supra-occipital below and is fused with these bones before or shortly after birth.
• The frontal sinus is prolonged into it in the adult.

Horse

• It is located on dorsal aspect of the cranium.
• The external face is quadrilateral, smooth and presents the sagittal parietal crest.
• The internal aspect presents a three sided process-the internal occipital protuberance or the ossific tentorium.

Dog

• Its location is similar to that of the horse.
• It fuses with the occipital before birth.
• It bears the high posterior part of the parietal crest.
• The ossific tentorium is of great size.

Fowl

• It is absent.