| The flow is helped by a series of one-way valves in the veins that only allow the blood to move upwards. |
| It is a one-way conduit for moving excess water, proteins, and molecules back into circulation. |
| It occurs when a one-way valve mechanism is present, enabling entry of air into the pleural space and not permitting its escape. |
| At the beginning of expiration, you tum the valve creating a one-way valve that only allows expiratory airflow. |
| The capsule admits afferent lymphatic vessels containing valves that provide one-way flow into the subcapsular sinus. |
| To keep blood from flowing backward, veins have built-in one-way valves that temporarily dam up the river of blood. |
