Plasma

Definition

Plasma is the liquid component of blood that holds blood cells in suspension. It contains various proteins, electrolytes, nutrients, and waste products.

5 Must Know Facts For Your Next Test

1. Plasma constitutes about 55% of total blood volume and is primarily composed of water.
2. It contains important proteins such as albumins, globulins, and fibrinogen which play roles in immunity and clotting.
3. Plasma carries antibodies that are crucial for the body's innate nonspecific immune responses.
4. Electrolytes in plasma help maintain pH balance and osmotic pressure essential for cell function.
5. Plasma transports metabolic waste products from tissues to excretory organs.

Review Questions

• What percentage of blood volume is made up by plasma?
• Name three key proteins found in plasma and their functions.
• How does plasma contribute to the body’s innate nonspecific immune responses?

Related terms

Serum:

The liquid part of blood after coagulation, devoid of clotting factors.

Antibodies:

Proteins produced by B-cells that neutralize pathogens like bacteria and viruses.

Electrolytes: Minerals in body fluids that carry an electric charge and are vital for cell function.