Cytotoxic T cells are the primary effector cells for cellular immunity. They target cells that have been infected by intracellular pathogens, destroying infected cells along with the pathogens inside.

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 T-calls can be classified in 4 ways:
- Helper T cells
- Regulatory T cells
- Cytotoxic T cells
- Thymocytes

Types of T Cells

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Microbiology covers the scope and sequence requirements for a single-semester microbiology course for non-majors. The book presents the core concepts of microbiology with a focus on applications for careers in allied health. The pedagogical features of the text make the material interesting and accessible while maintaining the career-application focus and scientific rigor inherent in the subject matter. Microbiology’s art program enhances students’ understanding of concepts through clear and effective illustrations, diagrams, and photographs.

Microbiology is produced through a collaborative publishing agreement between OpenStax and the American Society for Microbiology Press. The book aligns with the curriculum guidelines of the American Society for Microbiology.

OpenStax Microbiology Textbook

Helper T cells serve as the key players that help activate and direct functions of humoral and cellular immunity.

Helper T Cells

Cytotoxic T Cells

Regulatory T cells maintain immune system balance by inhibiting excessive immune responses, preventing autoimmune diseases.

Regulatory T Cells

Thymocytes are immature T lymphocytes in the thymus. While they are in the thymus they undergo thymic selection. 

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