The material that a wave passes through is referred to as a medium. ALL waves that cause a movement of the particles in a medium are called
mechanical waves and CANNOT TRAVEL IN SPACE!!
Ext: Why does this mean that they cannot travel in space?

Blood pressure the total amount of blood the heart pumps in one minute 2. cardiac output the number of times your heart beats in a minute 3. dilate the amount of blood that the heart can pump in a single beat 4. heart rate the force exerted on the walls of the blood vessels by the blood that moves through them 5. stroke volume to widen or get larger in size