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What is the Immune System?

What is the Immune System?

Cell-mediated Immune Responses

Cell-mediated Immune Responses

Defense Against Bacterial Pathogens

Defense Against Bacterial Pathogens

The human immune system is a complex network of cells, tissues, and organs that work together to defend the body against bacterial infections. It consists of various immune cells, each playing a specific role in the defense mechanism.
Phagocytes
Phagocytes are the frontline soldiers of the immune system. They include neutrophils and macrophages. Neutrophils are the most abundant type of white blood cell and are quickly mobilized to the site of infection. Macrophages are larger cells that patrol...

Immune Response Against Viral Pathogens

Immune Response Against Viral Pathogens

The immune system's response to viral infections is a complex and coordinated process involving natural killer (NK) cells, T cell-mediated responses, and antibody-mediated responses.
NK Cells
NK cells are a crucial part of our innate immune system, acting as the first line of defense against viral infections. These cells can recognize and kill infected cells without prior exposure to the virus, effectively slowing down the spread of infection. Additionally, NK cells produce proinflammatory...

Introduction to Innate and Adaptive Immunity

Introduction to Innate and Adaptive Immunity

The human immune system is a complex defense mechanism that protects the body from harmful pathogens and foreign substances. It comprises two crucial components: innate and adaptive immunity.
Innate immunity is the body's natural, nonspecific defense system that acts quickly to protect against pathogens. It incorporates physical barriers like skin and mucous membranes and cellular elements such as phagocytes and natural killer cells. This part of our immune system provides an immediate,...

Humoral Immune Responses

Humoral Immune Responses

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相关实验视频

Updated: Jan 4, 2026

T Cells Capture Bacteria by Transinfection from Dendritic Cells

T Cells Capture Bacteria by Transinfection from Dendritic Cells

Published on: January 13, 2016

免疫系统模仿病原体

¹Department of Chemistry and Department of Biochemistry and Molecular Biology, The Pennsylvania State University, PA 16802, USA. akb20@psu.edu.

Science (New York, N.Y.)

|November 2, 2019

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No abstract available in PubMed .

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Last Updated: Jan 4, 2026

T Cells Capture Bacteria by Transinfection from Dendritic Cells

T Cells Capture Bacteria by Transinfection from Dendritic Cells

Published on: January 13, 2016

Dissecting Innate Immune Signaling in Viral Evasion of Cytokine Production

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Imaging the Human Immunological Synapse

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