Carcinoembryonic Antigen (CEA). Clinical Use. Monitor persistent, metastatic, or recurrent adenocarcinoma of the colon following curative surgery. Clinical Background. CEA is an oncofetal glycoprotein present in the gastrointestinal tract and body fluids of the embryo and fetus.arcinoembryonic Antigen (CEA). Clinical Use. Monitor persistent, metastatic, or recurrent adenocarcinoma of the colon following curative surgery. Clinical Background. CEA is an oncofetal glycoprotein present in the gastrointestinal tract and body fluids of the embryo and fetus.
Additionally, right-clicking on the lock of an Ender Chest with a diamond makes it private. Private Ender Chests will only link up to other private chests of the same color and locked by the same player. As they are made of obsidian, Ender Chests are mined using a pickaxe.
3. Cross your hands in front of your chest. For more advanced crunches, put your hands behind your head, but with the fingertips lightly touching the head, not clasping the head or neck. 4. Make sure there is a fist's worth of space between your chin and chest. 5. Draw your belly button in to the base of your spine. 6. Sit up until your elbows or chest reach your knees. Be careful to use abdominal rather than back, leg or neck muscles. 7. Exhale as you sit up. Inhale as you lie down. 8. Do two or three sets of 10 to 15 repetitions each. Stretch between sets.