How do ultrasounds work?

Ultrasounds or ultrasonography is a technique used by doctors to check how the patient's baby is developing or to check the circulation of blood in a limb or your heart. It is a popular way to see what is going on in your body.

By sending high frequency sound waves, the ultrasound is able to use the echoing of them to make a picture of the limb or baby. It sort of uses echolocation like a bat, dolphin, or whale. Once the high frequency sound waves are sent by the probe they are either reflected by tissue or continue moving until they are reflected back to the probe. By using the length of the echoing and the points that the frequencies are reflected the machine can display a picture on the screen of what is going on in that section of your body.

Being able to see what is going on in your body can help predict when you are due for labor. By knowing this you can ready yourself for your incoming baby. Overall, ultrasounds work by using high frequency waves and the echoing of them, they are used by doctors to examine the development of the baby or the circulation of blood in someones limb or heart. This is what ultrasounds do to display a picture on a screen.

Can Too Much TV and Computer Time Hurt Your Heart?

What do you do while watching t.v or on the computer? Sit.

Studies show that because you are sitting while doing these activities it causes your body to produce less of an enzyme that breaks down fats in your blood. Without enough enzymes in your blood can cause an early heart attack or stroke. "Too much sitting is not the same thing as too little exercise."~ Dr. Barry Braun. Even if you add a little bit of exercise to your daily routine you would still need to cut down on your t.v and computer time.

Is all of this really true? Can I get a heart attack or stroke from sitting?

The scientists working on this project are still not positive that hear problems and sitting can be linked together. But many signs lead to sitting being a cause of heart troubles. While watching t.v you have more of a temptation from commercials to eat unhealthy foods which causes weight gain. So far their instincts tell them that sitting can cause heart problems and not enough enzymes in your blood, but they still need to investigate further into this situation. But this is only so far in their scientific investigation into the serious effects on what sitting can do to your body.