serum etymology

Etymology:

  • Latin: "serum" meaning "whey," the liquid that separates from coagulating milk.

Meaning:

Serum is the clear, straw-colored liquid component of blood that remains after the removal of red blood cells, white blood cells, and clotting factors. It contains various proteins, hormones, electrolytes, and other dissolved substances.

Origin:

The term "serum" was first used in the 16th century to describe the fluid that separated from milk when it was allowed to coagulate. It was later adopted in the field of medicine to refer to the non-cellular component of blood.

Additional Notes:

  • The word "serum" is also used in immunology to refer to the blood plasma from an animal that has been vaccinated or exposed to a specific antigen, containing antibodies specific to that antigen.
  • Serum is often collected for medical testing to determine the levels of various substances in the body and to diagnose and monitor diseases.
  • The plural form of serum is "sera."

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