kokonaisverestä

Kokonaisverestä, often translated as "whole blood," refers to blood in its entirety as it circulates through the body. It is a specialized connective tissue composed of plasma and various formed elements. Plasma, the liquid component, constitutes about 55% of whole blood by volume and is primarily water, containing dissolved proteins, glucose, mineral ions, hormones, and carbon dioxide. The formed elements make up the remaining 45% and include red blood cells (erythrocytes), white blood cells (leukocytes), and platelets (thrombocytes).

Red blood cells are responsible for transporting oxygen from the lungs to the tissues and carbon dioxide from the tissues to the lungs. White blood cells are integral to the immune system, defending the body against infection and disease. Platelets play a crucial role in hemostasis, the process of blood clotting to stop bleeding.

Whole blood serves numerous vital functions, including oxygen and nutrient delivery, waste removal, immune defense, and maintaining homeostasis. It is collected for various medical purposes such as blood transfusions, diagnostic testing, and research. The composition and volume of whole blood can be affected by factors like hydration, diet, and underlying medical conditions. Understanding the components and functions of whole blood is fundamental to comprehending physiological processes and medical interventions.