GLOSSARY+ABOUT+THE+CIRCULATORY+SYSTEM

that controls the one-way passage of fluid through that organ ||  ||
 * VALVE: A flaplike structure in a hollow organ, such as the heart,
 * VALVE: A flaplike structure in a hollow organ, such as the heart,
 * VALVE: A flaplike structure in a hollow organ, such as the heart,
 * VALVE: A flaplike structure in a hollow organ, such as the heart,
 * VALVE: A flaplike structure in a hollow organ, such as the heart,
 * VALVE: A flaplike structure in a hollow organ, such as the heart,
 * VALVE: A flaplike structure in a hollow organ, such as the heart,