What the Mouth and Teeth Do. The first step of digestion involves the mouth and teeth. Food enters the mouth and is immediately broken down into smaller pieces by our teeth. Each type of tooth serves a different function in the chewing process. Incisors cut foods when you bite into them. The sharper and longer canines tear food.
CFS is most common in women ages 30 to 50. The hallmark symptom is persistent and profound fatigue, which often worsens after physical or mental exertion. Symptoms may also include muscle aches, headache, and extreme fatigue. The main symptom of CFS is extreme tiredness that is: New.
Signs of physical and emotional exhaustion: 1  Chronic fatigue. 2  In the early stages, you may feel a lack energy and feel tired most days. 3  In the latter stages, you feel physically and emotionally exhausted, drained, and depleted, and you may feel a sense of dread for what lies ahead on any given day. 4  Insomnia.