Fine-needle aspiration. Fine-needle aspiration (FNA), or fine-needle aspiration cytology (FNAC), is a diagnostic procedure used to investigate lumps or masses. In this technique, a thin (23-25 gauge), hollow needle is inserted into the mass for sampling of cells that, after being stained, will be examined under a microscope.
The function of blood vessels is to carry blood around the body. Blood vessels are the passageway of blood. They are found all over your body. When any blood vessel is punctur â¦ ed or cut,blood flows out.There are three kinds of blood vessels in the human body. These are arteries,the veins, and the capillaries.he function of the blood is mainly transportation. the blood leaves the left side of the heart oxygenated and full of nutrients which is then transported around the body via â¦ arteries and veins. Blood is 50% plasma which is a straw coloured liquid.
Whole blood is a mixture of blood cells and plasma. In addition to the cells mentioned above, the blood also contains clotting factors and other important substances, such as nutrients from the food that has been processed by the digestive system. Blood performs important functions, some of which are as under:-. 2  Supply of oxygen to cells / tissues. 3  Supply of nutrients such as glucose, amino acids and fatty acids Removal of waste such as carbon dioxide, urea and lactic acid.