An object, usually a metal bar, placed into the mouth of a horse, held on by a bridle and used with reins to direct and guide the animal. Occasionally made of other materials, including rubber.May be solid or jointed and may have rollers or other attachments added, usually in the center.
There are 32 teeth in the human mouth, including the wisdom teeth at the back that most people have removed. But how many of them do we seriously need? This question has exercised dentists since the dawn of the NHS with its cash-limited budget for treatment.
Human tooth. For other uses of tooth or teeth, see Tooth (disambiguation). The human teeth function to mechanically break down items of food by cutting and crushing them in preparation for swallowing and digesting. Humans have four types of teeth: incisors, canines, premolars, and molars, each with a specific function.