A unit of donated fresh<unk> <unk>  is a light amber-colored liquid component of blood in which blood cells are absent, but contains proteins and other constituents of whole blood in suspension. It makes up about 55% of the body's total blood volume. It is the intravascular part of extracellular fluid (all body fluid outside cells). It is mostly water (up to 95% by volume), and contains important dissolved proteins (6–8%; e.g., serum albumins, globulins, and fibrinogen), glucose, clotting factors, electrolytes (, , , , , etc.), hormones, carbon dioxide<unk>  being the main medium for excretory product transportation), and oxygen. It plays a vital role in an intravascular osmotic effect that keeps electrolyte concentration balanced and protects the body from infection and other blood-related disorders.<unk>  is separated from the blood by spinning a vessel of fresh blood containing an anticoagulant in a centrifuge until the blood cells fall to the bottom of the tube. The<unk>  is then poured or drawn off. For point-of-care testing applications,<unk>  can be extracted from whole blood via filtration or via agglutination to allow for rapid testing of specific biomarkers.<unk>  has a density of approximately . Blood serum is<unk>  without clotting factors.<unk> pheresis is a medical therapy that involves<unk>  extraction, treatment, and reintegration. Fresh frozen<unk>  is on the WHO Model List of Essential Medicines, the most important medications needed in a basic health system. It is of critical importance in the treatment of many types of trauma which result in blood loss, and is therefore kept stocked universally in all medical facilities capable of treating trauma (e.g., trauma centers, hospitals, and ambulances) or that pose a risk of patient blood loss such as surgical suite facilities.
Blood plasma
Serum 
Venous blood
Body fluid
Urine
Arterial blood
Whole blood
Cord blood