What does it mean when you wake up laughing?

Is esophagus part of the respiratory system? What is the clear stuff that collects on your top front teeth sometimes? Can a black eye stay on you forever? What were Louis Pasteur and emile roux doing on the mountain in the meadow and the dirty city streets? What is Occlusal Irregularities? What are the symptoms of high serotonin levels? Does having a sudden leak of discharge that has a slight foul smell mean you should go to the hospital If you are 35 week pregnant? What is a head chart or head arrangement? Hurts in your back when breathing and heart palpitations? What does impaired drivers means? How many infection nosocomial? What side of your neck is your jugular on? What can cause nausea fatigue and blackouts in men? Should you cover your shingles with bandage? Can young pregnancy cause birth defects? Do irritants and carcinogens contain nicotine? What happens if the pancreas and kidneys stop working at the same time? What stress test measures the workload and the heart rate while also measuring the oxygen desaturation level? What is an acrostic poem for the Endocrine System? How do dental crowns stay in place?