Nucleic acids consist of a backbone of sugar alternating with a phosphate group; this backbone is bonded to the nitrogenous base. The five-carbon sugar can be deoxyribose as in DNA or ribose as in RNA. Four nitrogenous bases are found in DNA and four are in RNA. Nitrogenous bases can be divided into two groups: purines and pyrimidines.
Angiography is an imaging test that makes a detailed picture (called an angiogram) of blood vessels. Angiography makes images of arteries and veins in the abdomen, brain, heart, kidneys, lungs and legs. Angiography shows blood flow and blood vessels that are obstructed, blocked, narrowed, enlarged or malformed.atheter angiography involves inserting a catheter into a blood vessel in your groin or elbow. The catheter wire is fed or guided to the appropriate area. X-rays are used to produce the angiogram (picture) of the vessel.
angioma. n, pl-mas or-mata (-mÉtÉ). 1. (Pathology) a tumour consisting of a mass of blood vessels (haemangioma) or a mass of lymphatic vessels (lymphangioma). (Ëaen ËÃ¦n dÊiËoÊ). mÉ., n. pl