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Macrophage engulfing TB bacteria. Computer illustration of a macrophage white blood cell (pink) engulfing tuberculosis (Mycobacterium tuberculosis) bacteria (orange). This process is called phagocytosis. Macrophages are cells of the body's immune system. They phagocytose and destroy pathogens, dead cells and cellular debris.
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Destruction of leukaemia blood cell, computer illustration. Conceptual image for leukaemia treatment.
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Mast cells. Light micrograph of a section through the sub mucosa of the trachea (wind pipe) showing mast cells (red). Mast cells (mastocytes) are a type of white blood cell (leukocyte) found in connective tissue. Magnification: x400 when printed at 10 centimetres wide.
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Blood stream. Computer artwork of red and white blood cells in a blood vessel.
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Macrophage engulfing TB bacteria. Computer illustration of a macrophage white blood cell (pink) engulfing tuberculosis (Mycobacterium tuberculosis) bacteria (orange). This process is called phagocytosis. Macrophages are cells of the body's immune system. They phagocytose and destroy pathogens, dead cells and cellular debris.
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Plasma cells. Computer artwork of plasma cells, a type of white blood cell, secreting antibodies (white).
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Blood stream. Computer artwork of red and white blood cells in a blood vessel.
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Leukaemia blood cells. Coloured scanning electron micrograph (SEM) of B lymphocyte white blood cells (round) from a patient with leukaemia. Magnification: x5000 when printed 10 centimetres wide.
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Appendicitis. Light micrograph of a section through an inflamed appendix. There is an accumulation of white blood cells (dark pink) at bottom left. Magnification@ x200 when printed at 10 centimetres wide.
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White blood cells. Coloured scanning electron micrograph (SEM) of white blood cells (leucocytes) and a platelet (thrombocyte, green). Magnification: x6,600 when printed at 10 centimetres wide.
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White blood cells. Coloured scanning electron micrograph (SEM) of white blood cells (leucocytes) and a platelet (thrombocyte, red). Magnification: x6,600 when printed at 10 centimetres wide.
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White blood cells. Coloured scanning electron micrograph (SEM) of white blood cells (leucocytes). Magnification: x2,400 when printed at 10 centimetres wide.
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Leukaemia blood cells. Coloured scanning electron micrograph (SEM) of B lymphocyte white blood cells (round) from a patient with leukaemia. Magnification: x5000 when printed 10 centimetres wide.
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Macrophage engulfing TB bacteria. Computer illustration of a macrophage white blood cell (blue) engulfing tuberculosis (Mycobacterium tuberculosis) bacteria (orange). This process is called phagocytosis. Macrophages are cells of the body's immune system. They phagocytose and destroy pathogens, dead cells and cellular debris.
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B-cell, coloured scanning electron micrograph (SEM). B-cells are a type of white blood cell involved in immune respone. They account for 10 per cent of the body's lymphocytes. On encountering a foreign antigen, such as a bacterial surface protein, the immature B-cell either divides into a number of plasma cells, which produce antibodies, or it matures into a memory cell. Memory cells remain in the
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Leukaemia blood cells. Coloured scanning electron micrograph (SEM) of red blood cells (erythrocytes, red) and B lymphocyte white blood cells (white) from a patient with leukaemia. Magnification: x2500 when printed 10 centimetres wide.
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White blood cells. Coloured scanning electron micrograph (SEM) of white blood cells (leucocytes). Magnification: x2,400 when printed at 10 centimetres wide.
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Pyoderma skin disease, coloured scanning electron micrograph (SEM). Large numbers of lymphocytes (white) and red blood cells are seen in necrotic tissue surrounding a hair shaft. Magnification: x3500 when printed at 10 centimetres tall.
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Pyoderma skin disease, coloured scanning electron micrograph (SEM). Large numbers of lymphocytes (blue) are present on the surface of the fractured skin. Magnification: x500 when printed at 10 centimetres tall.
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Blood cells. Coloured scanning electron micrograph (SEM) of human blood showing a red and white cell ( lymphocyte). Red blood cells (erythrocytes) have a characteristic biconcave-disc shape and are numerous. These large cells contain haemoglobin, a red pigment by which oxygen is transported around the body. They are more numerous than white blood cells, one of which is visible in this sample (whit
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Activated human macrophage, coloured scanning electron micrograph (SEM). Magnification: x2,700 when printed at 10 centimetres wide.
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Pyoderma skin disease, coloured scanning electron micrograph (SEM). Large numbers of lymphocytes (yellow) and red blood cells are seen in necrotic tissue surrounding a hair shaft. Magnification: x3500 when printed at 10 centimetres tall.
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Pyoderma skin disease, coloured scanning electron micrograph (SEM). Lymphocytes (blue) and red blood cells are present in the necrotic tissue on the surface of the fractured skin. Magnification: x1000 when printed at 10 centimetres tall.
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B-cell, coloured scanning electron micrograph (SEM). B-cells are a type of white blood cell involved in immune respone. They account for 10 per cent of the body's lymphocytes. On encountering a foreign antigen, such as a bacterial surface protein, the immature B-cell either divides into a number of plasma cells, which produce antibodies, or it matures into a memory cell. Memory cells remain in the
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White blood cells. Coloured scanning electron micrograph (SEM) of white blood cells (leucocytes). Magnification: x2,400 when printed at 10 centimetres wide.
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Human blood cells, coloured scanning electron micrograph (SEM). Seen here are red blood cells (red), a lymphocyte (pink), a neutrophil (large cream cell), a macrophage (green) and platelets (small cream cells). Magnification: x3300 when printed at 10 centimetres wide.
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Herpes virus particles, coloured transmission electron micrograph (TEM). Each particle (virion) of this virus, the HHV-6 (human herpes virus-6), consists of a double stranded deoxyribonucleic acid (DNA) genome surrounded by an icosahedral capsid (yellow), which is itself surrounded by an envelope covered in glycoprotein spikes (blue). HHV-6 infects white blood cells, specifically T lymphocytes, (o
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White blood cells. Coloured scanning electron micrograph (SEM) of B lymphocyte white blood cells. Magnification: x5000 when printed at 10 centimetres wide.
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Blood cells, coloured scanning electron micrograph (SEM). Seen here are slightly crenated (wrinkled) red blood cells (erythrocytes) and a single white blood cell (yellow). The main function of red blood cells is to distribute oxygen to body tissues, and to carry waste carbon dioxide back to the lungs. White blood cells are part of the immune system; they destroy and remove old or aberrant cells an
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Computer illustration of a cancerous white blood cell in leukaemia.
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White blood cells. Coloured scanning electron micrograph (SEM) of white blood cells (leucocytes) and a platelet (thrombocyte, orange). Magnification: x6,600 when printed at 10 centimetres wide.
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Pyoderma skin disease, coloured scanning electron micrograph (SEM). Lymphocytes (yellow) are present on the surface of the fractured skin and red blood cells can be seen in the deeper epidermal layers. Magnification: x1000 when printed at 10 centimetres tall.
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Chimeric antigen receptor (CAR) on T-cell, illustration. The CAR structures are blue, with the cutaway foreground showing one spanning the cell membrane. These CARs are on the surface of an engineered T-cell. CARs are engineered cell receptors that allow T cells to recognize and attack cancer cells in a specific way. They are built by connecting several functional parts from different proteins. Th
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Leukaemia white blood cells, coloured scanning electron micrograph (SEM). Magnification: x4000 when printed at 10 centimetres wide.
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Red and white blood cells, scanning electron micrograph (SEM). Blood sample from a patient with chronic lymphocytic leukaemia (CLL). Magnification: x2500 at 10 centimetres wide.
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Blood cells. Computer artwork of red blood cells, and white blood cells.
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Pyoderma skin disease, coloured scanning electron micrograph (SEM). Lymphocytes (pink) are present on the surface of the fractured skin and red blood cells can be seen in the deeper epidermal layers. Magnification: x1000 when printed at 10 centimetres tall.
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Red and white blood cells, scanning electron micrograph (SEM). Blood sample from a patient with chronic lymphocytic leukaemia (CLL). Magnification: x2500 at 10 centimetres wide.
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Leukaemia blood cells. Coloured scanning electron micrograph (SEM) of red blood cells (erythorocytes, orange) and B lymphocyte white blood cells (white) from a patient with leukaemia. Magnification: x2500 when printed 10 centimetres wide.
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Lymphocytes attacking viruses, conceptual computer illustration. T- and B-lymphocytes are part of the immune system. B cells mature in bone marrow and are responsible for humoral immunity; they operate by recognising a specific site (antigen) on the surface of a pathogen or foreign object, which they bind to before producing antibodies to destroy that antigen. T cells mature in the thymus and are
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Blood cells. Coloured scanning electron micrograph (SEM) of human blood showing a red and white cell ( lymphocyte). Red blood cells (erythrocytes) have a characteristic biconcave-disc shape and are numerous. These large cells contain haemoglobin, a red pigment by which oxygen is transported around the body. They are more numerous than white blood cells, one of which is visible in this sample (blue
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Lymphocytes attacking viruses, conceptual computer illustration. T- and B-lymphocytes are part of the immune system. B cells mature in bone marrow and are responsible for humoral immunity; they operate by recognising a specific site (antigen) on the surface of a pathogen or foreign object, which they bind to before producing antibodies to destroy that antigen. T cells mature in the thymus and are
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Lymphocytes, computer artwork. T- and B-lymphocytes are part of the immune system. B cells mature in bone marrow and are responsible for humoral immunity; they operate by recognising a specific site (antigen) on the surface of a pathogen or foreign object, which they bind to before producing antibodies to destroy that antigen. T cells mature in the thymus and are involved in cell-mediated immunity
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Leukaemia blood cells. Light micrograph of blood cells (mainly B cells, dark purple) in the liver of a patient with lymphocytic leukaemia.
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Plasma cell and antibodies, illustration. Plasma cells are mature B lymphocytes (white blood cells) that produce and secrete antibodies during an immune response.
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White blood cells. Coloured scanning electron micrograph (SEM) of B lymphocyte white blood cells. Magnification: x5000 when printed at 10 centimetres wide.
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Leukaemia, conceptual composite image. Scanning electron microscopy (SEM) and computer generated image (CGI) of DNA (deoxyribonucleic acid) molecules (helices) and red and white blood cells. Leukaemia is cancer of the white blood cells. Leukemias are caused by mutations in the DNA of blood cells. These genetic mutations change the way the blood cells reproduce and can also prevent them from funct
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Computer illustration of a cancerous white blood cell in leukaemia.
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Computer illustration of red blood cells and a cancerous leukaemia white blood cell.
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T lymphocyte and cancer cell. Computer artwork of a T lymphocyte cell attached to a cancer cell. T lymphocytes are a type of white blood cell that recognise a specific site (antigen) on the surface of cancer cells or pathogens and bind to it. Some T lymphocytes then signal for other immune system cells to eliminate the cell. The genetic changes that cause a cell to become cancerous lead to the pre
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Computer illustration of a cancerous white blood cell in leukaemia.
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- Immunotherapy, conceptual composite image. Scanning electron microscopy (SEM) and computer generated image (CGI) of DNA (deoxyribonucleic acid) molecules (helices) and a T lymphocyte white blood cell (top right). Therapies such as chimeric antigen receptor (CAR) T-cell cancer immunotherapy reprogram a patient's own immune cells to treat cancer.
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Computer illustration of cytotoxic T-lymphocytes attacking a cancer cell.
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