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.
Blood is a bodily fluid in humans and other animals that delivers necessary substances such as nutrients and oxygen to the cells and transports metabolic waste products away from those same cells.he blood cells are mainly red blood cells (also called RBCs or erythrocytes), white blood cells (also called WBCs or leukocytes) and platelets. The most abundant cells in vertebrate blood are red blood cells.
10 hilariously insightful foreign words. The functions of blood are numerous but can essentially be broken down into two subsets. Blood transports things to the various tissues of the body, and it removes things from the tissues of the body.ertain types of blood cells go into action only if the body requires it, and this is one of the major functions of blood. If bacteria enter the body, white blood cells arrive to fight it.