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.
An abdominal ultrasound is a non-invasive imaging test that uses sound waves to create images of organs within the abdomen.or example, an ultrasound would be able to show the presence of a gallstone or cyst, as well as the swelling of the liver. An abdominal ultrasound can be used to evaluate the gallbladder, liver, bile ducts, pancreas, spleen, and kidneys.