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
Off-the-Neck Historic District Off-the-Neck Historic District The Off-the-Neck Historic District encompasses a well-preserved set of early 19th-century rural properties on Maine State Route 166 (SR 166) in Castine, Maine, as well as canal dug in 1779 by British forces during the American Revolutionary War across the neck separating the Bagaduce Peninsula (where the main village of Castine is located) from the mainland. The district takes its name from the fact that the included properties are just north of this neck on the mainland. The district was listed on the National Register of Historic Places in 1986. Maine State Route 166 (SR 166) is