happygirl15 happygirl15
  • 12-08-2021
  • Biology
contestada

Which structure represents the body's first line of defense against infection?
A. Thymus
B. Skin
C. Bone marrow
D. Tonsils

Respuesta :

dr84wybpty dr84wybpty
  • 12-08-2021
The answer is A : Thymus
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rthomas111 rthomas111
  • 12-08-2021
The first line of defense for the body is the skin. It forms the layer that keeps external things out.
Answer Link

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