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.
Located at the junction of the esophagus and the stomach is the lower esophageal sphincter, a muscular ring that prevents food from reentering the esophagus. The human esophagus consists of three parts, which total to a length of about 25 cm. Not only does the length of the esophagus vary among humans, but also among different animals. For example, a fish would possess a shorter esophagus than a giraffe.