When food enters from esophagus, one of the functions of the stomach is to produce and release enzymes. These enzymes help in the digestive mechanism. The pH here is two (2) that provides the optimum acidity environment for the maximum activity of pepsin, a protein-digesting enzyme.
The clavichord is a European stringed keyboard instrument known from the late Medieval, through the Renaissance, Baroque and Classical eras. Historically, it was mostly used as a practice instrument and as an aid to composition, not being loud enough for larger performances. The clavichord produces sound by striking brass or iron strings with small metal blades called tangents. Vibrations are transmitted through the bridge(s) to the soundboard.
A gizzard is an organ found in the digestive tract of a chicken. Similar to a stomach, the gizzard is used to grind up the foods the bird eats. Gizzards are considered a delicacy in certain cultures, and provide a healthy dose of certain vitamins and minerals. There are drawbacks to eating chicken gizzards, which decreases their nutritional value.