Examlex
Concentric rings found in the wood of the trees are known as:
Primary Response
The initial response of the immune system to a new antigen, typically involving the activation and proliferation of specific lymphocytes.
Secondary Response
The immune system's enhanced reaction upon a second or subsequent encounter with an antigen, typically faster and more vigorous than the primary response.
Initial Antigen
The foreign substance or pathogen that triggers an immune response in the body, leading to the production of antibodies.
Dashed Line
A line consisting of dashes, often used in diagrams and drawings to represent boundaries, paths, or other entities that are not continuously solid.
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