In biology, an adaptation, also called an adaptive trait, is a trait with a current functional role in the life of an organism that is maintained and evolved by means of natural selection. Adaptation refers to both the current state of being adapted and to the dynamic evolutionary process that leads to the adaptation.
Computed Tomography Angiogram (CT Angiogram). Guide. A computed tomography angiogram (CT angiogram) is a test that uses X-rays to provide detailed pictures of the heart and the blood vessels that go to the heart, lung, brain, kidneys, head, neck, legs, and arms.
Comments (2). An angiogram is a test that uses a special type of X-ray, fluoroscopy, to take images of the blood flow in arteries or veins in the head, arms, chest, legs or back. A special contrast dye is then is injected and X-rays are then taken from many angles. 2  During an angiogram, treatments such as removing a blockage in a blood vessel or stopping internal bleeding can be performed, if necessary.