Abstract
Blood is a vital fluid in the human body, responsible for transporting oxygen, nutrients, hormones, and waste products while also playing a crucial role in thermoregulation and immunity. It consists of plasma, red blood cells, white blood cells, and platelets, each performing essential functions. This article explores the composition of blood, the factors contributing to its color and odor, the role of hemoglobin in oxygen transport, and the classification of blood types based on marker proteins. Additionally, it highlights the significance of platelets in clotting and the impact of blood disorders such as anemia. Understanding blood's composition and functions is critical for medical science, diagnostics, and treatment of hematological diseases.
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