Helper T Cell Pictures, Images and Stock Photos

A T cell, or T lymphocyte, is a type of lymphocyte (a subtype of white blood cell) that plays a central role in cell-mediated immunity.

Cells of the immune system. leukocytes Eosinophil, Neutrophil, Basophil, Macrophage, Fibroblast, and Dendritic cell. Set of transparent realistic White blood cells on a dark background. Vector illustration

Activated T helper cells segregate the cytokines IL-4, IL-5, IL-6, IL-9, IL-10 and IL-13, leading to B cell antibody class switching, activation of cytotoxic T cells, and maximazing the bactericidal activity of phagocytes such as macrophages. Source: PDB entries 2B8U, 3VA2, 1ALU, 2H24, 3BPO

An activated T helper cell segregates the cytokines IL-4, IL-5, IL-6, IL-9, IL-10 and IL-13, leading to B cell antibody class switching, activation of cytotoxic T cells, and maximazing the bactericidal activity of phagocytes such as macrophages. Source: PDB entries 2B8U, 3VA2, 1ALU, 2H24, 3BPO

B-cell and T helper cells. Basic B-cells function: bind an antigen, receive help from a T helper cell, and differentiate into a plasma cell that secretes large amounts of antibodies. Human immune system

The antigen is a peptide from a tumor cell, bacteria or virus. Dendritic cells present antigens to lymphocytes through their membran bound MHC-molecules. After binding to the MHC-antigen complex, the T-cell receptor sends a signal cascade into the T-lymphocyte cell, that activates an immune response.

B-cells and T-cells schematic diagram, vector illustration, immune system cell functions.

Cells of the immune system. White blood cells or leukocytes Eosinophil, Neutrophil, Basophil, Macrophage, Fibroblast, and Dendritic cell. Vector illustration

Interleukin 5 is produced by T helper cells. It stimulates B cell growth, increases immunoglobulin secretion and mediates eosinophil activation

Dendritic cells are antigen-presenting cells of the immune system. Their main function is to process antigen material and present it on the cell surface to the T cells of the immune system. They are messengers between the innate and the adaptive immune systems.

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White cells (helper -T) against virus

Activation of B-cell leukocytes: lymphoblast, activation, memory B-leukocyte, virus, plasma cell, antibody, antigen, and naive lymphocyte

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Young adult woman working and playing with dogs in animal shelter

Cytokines and Cytokine receptor. signal transduction between cells. endocrine, paracrine and autocrine secretion

Activation of T-cell leukocytes. T-cell encounters its cognate antigen on the surface of an infected cell. T cells direct and regulate immune responses and attack infected or cancerous cells.

disabled man isolated on white background. a man in a wheelchair. vector illustration

HIV viral life cycle. Active infection of t cell by HIV. Vector diagram

Activation of B-cell leukocytes: lymphoblast, activation, memory B-leukocyte, virus, plasma cell, antibody, antigen, and naive lymphocyte

Happy young woman with grocery bag help elderly grandmother. Smiling caring girl assist senior granny outdoors. Vector illustration.

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Children's illustration of a cell attacking a character that could represent the coronavirus, another virus, or malignant cancer cells. Graphic to explain to children how the therapies against these diseases work

Cytokines - proteins that are important in cell signaling. They are released by cells and affect the behavior of other cells. Cytokines include interferons, interleukins, lymphokines and other. Cytokines are produced by a broad range of cells, including immune cells: macrophages, B lymphocytes, T lymphocytes and mast cells.

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T cells play a key role in the development of long-term immunity. to coronavirus. Helper T cells stimulate B cells and other immune cells, whereas killer T cells target and destroy infected cells.

Cells of the immune system. White blood cells or leukocytes Eosinophil, Neutrophil, Basophil, Macrophage, Fibroblast, and Dendritic cell. Set of transparent realistic cells on a white background. Vector illustration

Dendritic cells are antigen-presenting cells of the immune system. Their main function is to process antigen material and present it on the cell surface to the T cells of the immune system. They are messengers between the innate and the adaptive immune systems.

Inspired by the moment the human's cell receptor opens the" door" and welcomes the COVID-19

Person give helping hand for stressed woman in hatch. Friend or colleague help distressed female in hole. Concept of support and assistance. Vector illustration.

Mucosal immune system diagram. Mucous or gut associated lymphoid tissue. Medical vector illustration

Adiponectin level. Lean people have High Adiponectin level, Obesity people with Overweight have Low Adiponectin level. Adipocytes in the fat tissue, Macrophage and T-cell in adipose tissue with inflammation

PD-1 (red) extends from the surface of a T-cell and interacts with the ligand protein PD-L1 (yellow) from an antigen presenting cell. Although the T-cell has been activated through the interaction of a T-cell receptor (blue) and a MHC protein (violett), PD-1 regulates these activation down. It is a checkpoint to slow down T-cells.

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T-cell and B-cell. Cells of Adaptive immune system. immune response and lymphocytes. Vector illustration on white background.

The Epstein-Barr virus (EBV) replication cycle (Entry to the cell, latency and reactivation). human herpesvirus. the cause of infectious mononucleosis and cancer.

Immunologically active proteins on a T-cell. TCR (blue), CD-4 (light blue), CD-28 (dark blue), PD-1 (magenta), CTLA-4 (violet), Ca-channel (dark violet). The T-cell receptor, CD-4 and CD-28 activate T-cells, while PD-1 and CTLA-4 inhibit the activation of T-cells.

Immune Response. Rapid and slow response of Adaptive and Innate Immunity and antibody activation. Cells of The Immune System. Immunology infographic. vector illustration

Interaction of MHC-II (red) with the T-cell receptor (blue) and CD4 (light blue) and B7-1 (orange) with CD-28 (dark blue) activates T-cells while the interaction of P7-1 with CTLA-4 (violett) and PD-L1 (yellow) with PD-1 deactivates T-cells

Helper T cells and Cytotoxic T-cells. CD8 and CD4 lymphocytes. Antigen presentation. TCR receptor on White blood cells. Adaptive immune response. Vector illustration

An activated T helper cell segregates the cytokines IL-4, IL-5, IL-6, IL-9, IL-10 and IL-13, leading to B cell antibody class switching, activation of cytotoxic T cells, and maximazing the bactericidal activity of phagocytes such as macrophages. Source: PDB entries 2B8U, 3VA2, 1ALU, 2H24, 3BPO

The antigen (light green) is a peptide from a tumor cell, bacteria or virus. Dendritic cells present antigens to lymphocytes through their membran bound MHC-molecules (orange). After binding to the MHC-antigen complex, the T-cell receptor (violet) sends a signal cascade into the T-lymphocyte cell, that activates an immune response.

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Young adult woman playing with dogs in animal shelter. She wants to adopt one dog and female worker heps her to decide.

Cytokines - proteins that are important in cell signaling. They are released by cells and affect the behavior of other cells. Cytokines include interferons, interleukins, lymphokines and other. Cytokines are produced by a broad range of cells, including immune cells: macrophages, B lymphocytes, T lymphocytes and mast cells.

immune response and Antigen presentation. Humoral immunity and antibody production. B-cell activation. Vector poster for education

T-cell receptor in complex with the MHC class II-peptide complex. The antigen (light green) is a peptide from a tumor cell, bacteria or virus. Dendritic cells present antigens to lymphocytes through their membran bound MHC-molecules (violet). CD4 molecules (light blue) bind to other portions of the MHC, strengthening the interaction. After binding to the MHC-antigen complex, The T-cell receptor (blue) sends a signal cascade through an attached G-protein into the T-lymphocyte cell, that activates an immune response.

Phagocytosis in immune system or apoptosis. three steps.

Adaptive and Innate immunity. Cells of The Immune System. Immune response. Immunology infographic. Rapid and slow response. Isometric flat vector Illustration

Dendritic cells are antigen-presenting cells of the immune system. Their main function is to process antigen material and present it on the cell surface to the T cells of the immune system. They are messengers between the innate and the adaptive immune systems.

Person give helping hand for stressed woman in hatch. Friend or colleague help distressed female in hole. Concept of support and assistance. Vector illustration.

Dendritic cells present antigens (green) to lymphocytes through their membran bound MHC-molecules (violet). CD4 molecules (light blue) bind to other portions of the MHC, strengthening the interaction. "nAfter binding to the MHC-antigen complex, The T-cell receptor (blue) sends a signal cascade through an attached G-protein into the T-lymphocyte cell, that activates an immune response.

Immune response. humoral immunity. antibody-mediated immunity. activation of macrophage, B-cell and Plasma cell. Antibodies bind to pathogen. Vector poster for education

Immune response. Cell-mediated immunity. activation of phagocytes, antigen-specific cytotoxic T-lymphocytes, and the release of cytokines in response to an antigen. Vector poster for educatio

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