Changes

===Prepuce===

===Prepuce===

The prepuce is the skin sheath that conceals the penis when it is flaccid and is formed by an invagination of the abdominal skin. The prepuce is hairless and contains many '''smegma''' secreting glands important for lubrication between the shaft of the penis and the prepuce during copulation. Within the prepuce are varying amounts of striated muscle fibres; the '''cranial prepucial muscles''' responsible for retracting the prepuce and the '''caudal prepucial muscles''' responsible for protracting the prepuce.

The prepuce is the skin sheath that conceals the penis when it is flaccid and is formed by an invagination of the abdominal skin. The prepuce is hairless and contains many '''smegma''' secreting glands important for lubrication between the shaft of the penis and the prepuce during copulation. Within the prepuce are varying amounts of striated muscle fibres; the '''cranial prepucial muscles''' responsible for retracting the prepuce and the '''caudal prepucial muscles''' responsible for protracting the prepuce. Unlike other species, the prepuce of the stallion contains a second prepucial fold in order to accommodate the length of the penis in this species. The '''external fold of the prepuce''' corresponds with the prepuce of other species. The '''prepucial fold''' is a second fold inside the prepucial sheath, which ends at the '''prepucial ring''' cranially.

 

===Muscles of the Penis===

===Muscles of the Penis===

==Accessory Sex Glands==

==Accessory Sex Glands==