Human digestive system swallowing and vomiting to prevent the contents of the stomach from entering the esophagus. As the esophagus does not have the same protection from acid as the stomach, any failure of this sphincter can lead to heartburn. The esophagus has a mucous membrane of epithelium which has a protective function as well as providing a smooth surface for the passage of food. Due to the high volume of food that is passed over time, this membrane is continuously renewed. The diaphragm is an important part of the body's digestive system. The muscular diaphragm separates the thoracic cavity from the abdominal
The Hardest Part Is the Night The Hardest Part Is the Night "The Hardest Part Is the Night" is a single by American rock band Bon Jovi. It is taken from their second album, "7800° Fahrenheit". It is notable for being the first Bon Jovi single to be released in the UK, where it charted at #68. It was the only single from the album not to chart in the U.S. Among Bon Jovi's early songs, "The Hardest Part is the Night" is the one that expresses most clearly Jon Bon Jovi's concerns with working class issues and the struggles of the underdog, a theme that