Plasma is the liquid portion of blood. About 55% of our blood is plasma, and the remaining 45% are red blood cells, white blood cells and platelets that are suspended in the plasma.
Plasma is about 92% water. It also contains 7% vital proteins such as albumin, gamma globulin and anti-hemophilic factor, and 1% mineral salts, sugars, fats, hormones and vitamins.
Plasma serves four important functions in our body:
1. Helps maintain blood pressure and volume.
2. Supply critical proteins for blood clotting and immunity.
3. Carries electrolytes such as sodium and potassium to our muscles.
4. Helps to maintain a proper pH balance in the body, which supports cell function.