Blood Cells and Their Functions

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Red Blood Cells (Erythrocytes)

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Transport oxygen from the lungs to body tissues and carry carbon dioxide back to the lungs for exhalation.

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Red Blood Cells

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Contain hemoglobin, a protein that binds to oxygen.

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White Blood Cells (Leukocytes)

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Part of the immune system; defend against infections and foreign substances.

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Types of White Blood Cells

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Lymphocytes, neutrophils, and monocytes, each with specific roles in the immune response.

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Movement of White Blood Cells

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Can move through blood vessels and into tissues to combat pathogens.

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Platelets (Thrombocytes)

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Play a key role in blood clotting and help prevent bleeding by forming plugs in damaged vessels.

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Origin of Platelets

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Cell fragments derived from large bone marrow cells called megakaryocytes.

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Plasma

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The liquid component of blood that carries cells, nutrients, hormones, and waste products.

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Role of Plasma in Body Regulation

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Helps maintain blood pressure and regulate body temperature.

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Components of Plasma

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Contains proteins (such as albumin and antibodies), electrolytes, and other substances.