The Valsalva maneuver and the vertebral vein system.
D002320:Cardiovascular Physiological Phenomena; D002319:Cardiovascular System / Q000502:physiology*; D006801:Humans; D012143:Respiratory Physiological Phenomena; D012137:Respiratory System / Q000502:physiology*; D013131:Spine / Q000098:blood supply*; D014636:Valsalva Maneuver
CARDIOVASCULAR SYSTEM/physiology; RESPIRATORY SYSTEM/physiology; SPINE/blood supply