Cell Types in Human Blood

• Blood is a complex fluid containing various types of cells, each with distinct roles in maintaining homeostasis, immunity, and oxygen transport. 
• These cells are broadly categorized into three main types: Red blood cells (erythrocytes), white blood cells (leukocytes), and platelets (thrombocytes). 
• Red blood cells (RBCs), also known as erythrocytes, are the most abundant cells in the blood. Their primary function is to transport oxygen from the lungs to the body’s tissues. 
• White blood cells (WBCs), also known as leukocytes, are essential components of the immune system that protect the body from infections, diseases, and foreign invaders. Leukocytes are classified into two broad categories based on the presence or absence of granules in their cytoplasm: granulocytes and agranulocytes. Granulocytes are further divided into three subtypes: Neutrophils, Eosinophils, and Basophils and agranulocytes into two main subtypes: Lymphocytes and Monocytes.
• White blood cells (WBCs), also known as leukocytes, are essential components of the immune system that protect the body from infections, diseases, and foreign invaders. Leukocytes are classified into two main categories based on the presence or absence of granules in their cytoplasm: granulocytes and agranulocytes.
• Granulocytes contain visible granules and are further divided into three subtypes: Neutrophils, Eosinophils, and Basophils. Agranulocytes, which lack visible granules, are divided into two main subtypes: Lymphocytes and Monocytes. Lymphocytes are further divided into three main types: T cells, B cells, and Natural Killer (NK) cells.

Cell types in Human blood

• Red Blood Cells (Erythrocytes)
• White Blood Cells (Leukocytes) 
  • Granulocytes 
    • Neutrophils
    • Eosinophils 
    • Basophils
  • Agranulocytes: 
    • Lymphocytes 
      • T cells
      • B cells 
      • Natural Killer (NK) cells
    • Monocytes
• Platelets (Thrombocytes)