To turn on the AutoRecover feature: 1  In Word 2010, from the menu, select 2  . In the window that opens, click the tab, icon, or list item. 3  If it is unchecked, check , and type a value next to minutes. 4  Click to make the change.
What is tooth enamel? Tooth enamel is a hard substance found in the shell of each of your teeth and is the part of the tooth thatâs visible when you look in your mouth. Enamel is considered the hardest substance in the human body. Itâs even harder than your bones; however, it can dissolve or decay when exposed to acid and a build-up of bacteria.
Cells in the human body require many compounds to survive. The main substances found in every cell are a combination of lipids, carbohydrates, nucleic acids and proteins.Each of these substances plays a different role in the body, and all of them must either come from the diet or be manufactured using other chemicals in the body.ells in the human body require many compounds to survive. The main substances found in every cell are a combination of lipids, carbohydrates, nucleic acids and proteins.