A system (including the thymus and bone marrow and lymphoid tissues) that protects the body from foreign substances and pathogenic organisms by producing the immune response.A system that provides a defense mechanism to organism, providing defensive measures against antigens which would prove harmful to the organism.
Ultrasound is a type of imaging. It uses high-frequency sound waves to look at organs and structures inside the body. Health care professionals use it to view the heart, blood vessels, kidneys, liver, and other organs. During pregnancy, doctors use ultrasound to view the fetus. Unlike x-rays, ultrasound does not expose you to radiation. During an ultrasound test, you lie on a table. A special technician or doctor moves a device called a transducer over part of your body. The transducer sends out sound waves, which bounce off the tissues inside your body.
Ultrasound is a medical technique for creating images using high frequency sound waves and echoes. An ultrasound during pregnancy is used to give the sonographer a look at how the baby is developing inside your womb, and this may help to detect any problems.If your scan takes place early in the pregnancy, you may be asked to attend the appointment with a full bladder.round 70 percent of pregnant women in the US will have an ultrasound. In the UK, this number is higher because ultrasounds are carried out as routine procedures for all pregnant women. Ultrasounds are used to determine the size of your baby, the estimated due date, and whether the babyâs organs are developing well.