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.
Your spleen's main function is to act as a filter for your blood.It recognizes and removes old, malformed, or damaged red blood cells. When blood flows into your spleen, your spleen performs quality control; your red blood cells must pass through a maze of narrow passages.Healthy blood cells simply pass through the spleen and continue to circulate throughout your bloodstream.plit and merge into it. Answered by The Community. Making the world better, one answer at a time. Your spleen's main function is to act as a filter for your blood. It recognizes and removes old, malformed, or damaged red blood cells.