The Embryonic Yolk Sac,the Liver,and the Bone Marrow Are Sites

question 39

Multiple Choice

The embryonic yolk sac,the liver,and the bone marrow are sites where

• A)immune responses to antigen occur.
• B)stem cells give rise to immature lymphocytes.
• C)antigen is filtered from the blood.
• D)antigen is filtered from tissue fluid.
• E)T lymphocytes complete maturation.

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