Samsung Galaxy Ace 4 smartphone with 4.00-inch 480x800 display powered by 1GHz processor alongside 512MB RAM and 5-megapixel rear camera.
Cells are the basic building blocks of all living things. The human body is composed of trillions of cells. They provide structure for the body, take in nutrients from food, convert those nutrients into energy, and carry out specialized functions.
Carcinoembryonic antigen (CEA) test. Introduction. A carcinoembryonic antigen (CEA) test is used to check how well treatment is working in certain types of cancer, particularly colon cancer. Carcinoembryonic antigens are harmful substances (usually proteins) that are produced by some types of cancer.