Keywords
Abstract
Blood is a vital fluid tissue responsible for numerous physiological processes, including oxygen transport, immune defense, and overall cellular activity regulation. It consists of plasma and cellular components, namely erythrocytes (red blood cells), leukocytes (white blood cells), and thrombocytes (platelets). Erythrocytes play a crucial role in respiration due to their elasticity, flexibility, and hemoglobin content, while leukocytes function in immune defense through phagocytosis. The average human blood volume constitutes approximately 7.5% to 10% of body weight, with variations influenced by factors such as age, physical exertion, and environmental conditions. This paper explores the composition, functions, and physiological significance of blood, highlighting its essential role in maintaining homeostasis and overall health.
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