Chewing chewing, the food (now called a bolus) is swallowed. It enters the esophagus and via peristalsis continues on to the stomach, where the next step of digestion occurs. Premastication is sometimes performed by human parents for infants who are unable to do so for themselves. The food is masticated in the mouth of the parent into a bolus and then transferred to the infant for consumption. (Some other animals also premasticate.) Cattle and some other animals, called ruminants, chew food more than once to extract more nutrients. After the first round of chewing, this food is called cud. Chewing is
Chewing tobacco cancer on June 16, 2014. He claimed the cancer was linked to his lifetime use of chewing and dipping tobacco. 1845: Baseball rules written, chewing tobacco use among players already rampant. 1890: Dr. Robert Koch shows that the spitting of chewing tobacco was leading to a spread of tuberculosis. This leads to a downturn in use of chewing tobacco among the general population, but baseball players continue use. 1909: Honus Wagner, a well-known American baseball player, tells American Tobacco Company to take his picture off of their cartons. He does not want to be responsible for influencing children to smoke.