BIOCHEMISTRY - Main Regulators and Biological Fluids of the Human Body - 2016

5. BLOOD BIOCHEMISTRY

5.1. Composition of Blood

Blood, like all other Tissues, consists of Cells and intercellular fluid. The components of blood include erythrocytes, leukocytes, thrombocytes, and plasma.

Erythrocytes — red Blood Cells, disc-shaped anucleated cells formed in the Bone Marrow. They transport oxygen with the help of Hemoglobin, which gives blood its red color.

Leukocytes — white blood cells, large opaque cells. They are subdivided into:

- lymphocytes (formed in the Lymph; they give rise to plasma cells that produce Antibodies);

- monocytes (formed in the bone marrow; they engulf Bacteria during phagocytosis).

Thrombocytes (platelets) — very small disc-shaped blood corpuscles formed in the bone marrow. They are not true cells and do not contain nuclei; they play a crucial role in blood clotting.

Blood Plasma — the liquid, colorless intercellular substance consisting of 90% Water, which suspends the blood cells.



Last update: 06/08/2026

Editorial and Educational Adaptation: This material has been compiled based on the primary/original source text. The project team performed an editorial review, corrected technical inaccuracies, structured sections, and adapted the content for an educational format.

What was processed:

  • elimination of formatting defects (OCR errors, structural breaks, corrupted characters);
  • editorial organization of content;
  • standardization of terminology in accordance with academic sources;
  • verification of factual statements against the original source text.

All mentions of the author, publication year, and origin of the primary text have been preserved in accordance with the source.