Scalp tenderness: Introduction. Scalp tenderness: pain occurring on and around the scalp. See detailed information below for a list of 15 causes of Scalp tenderness, Symptom Checker, including diseases and drug side effect causes. Â» Review Causes of Scalp tenderness: Causes | Symptom Checker Â».
Functions that occur at the mouth. 1. Begin mechanical digestion (by the teeth & tongue) 2. Begin chemical digestion (by salivary enzymes) 3. Monitor food quality/taste (by the tongue) 4. Moisten and manipulate food to prepare for swallowing (by saliva and tongue, respectively).
In chemical digestion, enzymes break down food into the small molecules the body can use. In the human digestive system, food enters the mouth and mechanical digestion of the food starts by the action of mastication (chewing), a form of mechanical digestion, and the wetting contact of saliva.n chemical digestion, enzymes break down food into the small molecules the body can use. In the human digestive system, food enters the mouth and mechanical digestion of the food starts by the action of mastication (chewing), a form of mechanical digestion, and the wetting contact of saliva.