Changes

==Structure and Function==

==Structure and Function==

Horns have a central, conical bony core or '''corunal process''' that grows out from the [[Skull and Facial Muscles - Anatomy & Physiology#Frontal Bone|frontal bone]] of the skull.  The bone is hollow and the space within it is continuous with the [[Paranasal sinuses - Anatomy & Physiology|frontal sinuses]].  The surface of the bone is ridged and porous and is covered with papillated [[Skin - Anatomy & Physiology#dermis|dermis]] that is continuous with the periosteum and [[Skin - Anatomy & Physiology#epidermis|epidermis]] which keratinises and forms the protective covering of the horn.

Horns have a central, conical bony core or '''corunal process''' that grows out from the [[Skull and Facial Muscles - Anatomy & Physiology#Frontal Bone|frontal bone]] of the skull.  After 6 months of age, the bone becomes hollow and the space within it is continuous with the [[Paranasal sinuses - Anatomy & Physiology|frontal sinuses]].  The surface of the bone is ridged and porous and is covered with papillated [[Skin - Anatomy & Physiology#dermis|dermis]] that is continuous with the periosteum and [[Skin - Anatomy & Physiology#epidermis|epidermis]] which keratinises and forms the protective covering of the horn.

In the neonate, the bone portion is very small, with a thin dermal and epidermal covering.  Removal of this covering will prevent the horn from growing and thus remove the requirement for disbudding later in life.

In the neonate, the bone portion is very small, with a thin dermal and epidermal covering.  Removal of this covering will prevent the horn from growing and thus remove the requirement for disbudding later in life.