Three species of sucking lice can be found on cattle in Missouri. The longnosed cattle louse is generally a pest of young cattle and is about 1/10 inch long. The shortnosed cattle louse is about 1/16 inch long and is more often a pest of older cattle. The little blue louse is about 1/16 inch long.
A common length of the esophagus of a giraffe is about 40 inches. That compares to about 8 to 10 inches in a human being.
The main function of the esophagus is to move food from the back of the mouth to the stomach. The adult esophagus is about 10 in (25 cm) long. It is consists of a layer of cells that secretes mucus and two layers of muscle, one circular and one longitudinal. This combination of muscles allows the esophagus to contract and propel food from the mouth the stomach. This rhythmic contraction is called peristalsis.