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What feature of erythrocytes accounts for their short lifespan of approximately 120 days?
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17. The Blood
Erythrocytes
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Which type of blood cell does not contain a nucleus?
A
Platelets
B
Erythrocytes
C
Lymphocytes
D
Leukocytes
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Understand the structure and function of the different types of blood cells listed in the problem: Platelets, Erythrocytes, Lymphocytes, and Leukocytes.
Recall that erythrocytes (red blood cells) are specialized for oxygen transport and lack a nucleus to maximize space for hemoglobin molecules.
Note that platelets are cell fragments involved in clotting and do not contain a nucleus, but they are not classified as blood cells.
Recognize that lymphocytes and leukocytes (white blood cells) are part of the immune system and contain a nucleus to support their complex functions, such as producing antibodies and responding to pathogens.
Conclude that erythrocytes are the type of blood cell that does not contain a nucleus, distinguishing them from other blood cells listed in the problem.
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