Head and neck anatomy may be important in the development of the BBB. Astrocytes may also be responsible for transporting ions (electrolytes) from the brain to the blood. Blood from the brain and neck flows from: (1) within the cranium via the internal jugular veins, a continuation of the sigmoid sinuses. The right and left external jugular veins drain from the parotid glands, facial muscles, scalp into the subclavian veins. The right and left vertebral veins drain the vertebrae and muscles into the right subclavian vein and into the superior vena cava, into the right atrium of the heart. The lymphatic system drains the
Head and Neck Cancer Alliance day are 20 times more likely to develop head and neck cancer in comparison to non-drinkers. Some symptoms of head and neck cancer are soreness of the throat, difficulty in jaw movement or swallowing, and the presence of a nodule or lump. The stage of the disease is a determining factor in deciding the prognosis of head and neck cancer. There is a correlation between disease stage, survival and quality of life. The median five-year survival drops significantly from about 80% with the presence of regional or distant metastasis. Nearly 8000 people die every year due to head and neck