The jugular |veins| lie deep inside the neck. They receive the ~blood~ from the |brain|, face and neck and return it to the |heart|. The |external jugular vein| is larger than the other |veins| in the neck, sometimes double their size. It has two pairs of |valves| to assist in transporting ~blood~. The first pair is placed at the enterance to the |subclavian vein| and the second pair is about an inch and a half above the |clavicle| (collar bone). The |internal jugular vein| lies deeper in the neck and runs parallel to the cartoid |artery|. It joins with the |subclavian vein| at its base to form the innominate |vein|. Like the |external jugular vein|, it also has two pairs of |valves| to assist in the transportation of ~blood~. As the pockets of the |valves| fill with returning ~blood~, the |valves| close and shut off part of the |vein|. Then, the muscles in the |vein| contract and help push the ~blood~ forward. The |valves| also make certain that the ~blood~ in the |veins| will never flow backward.
