Last Updated on February 19, 2025 by Analgesia team
What is Plasma In The Blood
Plasma is a liquid component of blood that carries nutrients, waste, and blood cells throughout the body. It also helps maintain fluid balance, blood pressure, and pH levels.
Plasma makes up about 55% of the volume of blood in the human body. The remaining 45% is made up of red blood cells, white blood cells, and platelets.
Proteins
- Albumin: The main protein in plasma, albumin helps keep fluid from leaking out of blood vessels. It also binds to and carries hormones and some medications.
- Antibodies: Also known as immunoglobulins, antibodies defend the body against bacteria, viruses, fungi, and cancer cells.
- Clotting factors: Control bleeding.
- Gamma globulin: A vital protein in plasma.
Other components
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Mineral saltsElectrolytes dissolved in plasma. Chloride is the main anion (negatively charged ion) in plasma. Sodium chloride is the main salt.
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BicarbonateHelps regulate pH and transport carbon dioxide.
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PhosphateHelps regulate pH and is important for cell chemical reactions and calcium metabolism.
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IodideTransported in trace amounts and absorbed by the thyroid gland to make thyroid hormone.
Plasma’s main function is to transport blood cells, nutrients, waste products, and other substances throughout the body. It also helps maintain blood pressure, circulation, and body temperature.