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 cancer, which is attributed to advanced stage disease at the time of diagnosis. Early detection is imperative for increasing chances of survival. Free screening clinics for head and neck cancers during Oral, Head and Neck Cancer Awareness week, sponsored by the Head and Neck Cancer Alliance, provides opportunities for earlier diagnosis of malignant cancer. Screenings for oral, head and neck cancer are generally available via your local physician, dentist and other healthcare facilities. The Head and Neck Cancer Alliance offers free screenings nationwide;free screenings are offered predominantly during Oral, Head and Neck Cancer Awareness Week in April at healthcare events