Multiple Choice
Red blood cells (erythrocytes) live for approximately how long in the circulation under normal conditions?
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17. The Blood
Erythrocytes
Multiple Choice
Which type of blood cell is the most numerous in the human body?
A
Platelets (thrombocytes)
B
Erythrocytes (red blood cells)
C
Neutrophils
D
Lymphocytes
Verified step by step guidance1
Step 1: Understand the types of blood cells mentioned: Platelets (thrombocytes) are cell fragments involved in clotting; Erythrocytes (red blood cells) carry oxygen; Neutrophils and Lymphocytes are types of white blood cells involved in immune response.
Step 2: Recall the relative abundance of these cells in human blood. Erythrocytes are known to be the most numerous, vastly outnumbering white blood cells and platelets.
Step 3: Consider typical counts per microliter of blood: Erythrocytes are usually around 4-6 million, platelets about 150,000-450,000, and white blood cells (including neutrophils and lymphocytes) about 4,000-11,000.
Step 4: Compare these values to identify which cell type is most numerous. The cell type with the highest count per volume of blood is the most numerous.
Step 5: Conclude that erythrocytes (red blood cells) are the most numerous blood cells in the human body based on their significantly higher count compared to platelets and white blood cells.
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