Describe the role of the valves in the veins of the leg. 10 points!?

1. Describe the role of the valves in the veins of the leg. 10 points! 2.While the chambers of the heart relaxes, there is always a residual pressure in the arteries. Give a reason for this pressure. 3.A doctor uses a blood pressure measuring blood pressure in patients a. The doctor has inflated the cuff just above the blood pressure is expected. Then the doctor has released the air slowly while listen to the pulse with a stethoscope. Describe how the change in the sound coming through the stethoscope is used to obtain measurements of blood pressure.

1. Them prevent reflux (eg, due to gravity) in the veins return blood to the heart. 2. Arteries have extended bands of smooth muscle (longitudinal, and how to move) and when extended by the force of blood pumped to your heart, no elastic recoil. This increased pressure (with the smaller size of the arteries) causes blood pumped away. 3. The cuff cut the traffic in the brachial artery. Sounds (called Korotkoff sounds) are caused by turbulent blood flow. They began when the pressure in the cuff is reduced a little less than the systolic pressure, so a little blood is forced through the opening. The sounds get louder as the cuff pressure is still under "deaf". Finally, the band does not distort the artery (systolic pressure) and stopping sounds When resumes normal laminar flow.

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