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    Karate player performing karate stance in fitness studio — Stock Photo
    Karate player performing karate stance in fitness studio
    Illustration of spleen in male body silhouette. — Stock Photo
    Illustration of spleen in male body silhouette.
    Side view of a mixed race male judo coach and teenage mixed race male judoka, wearing blue and white judogi, practicing judo during a training in a gym. — Stock Photo
    Side view of a mixed race male judo coach and teenage mixed race male judoka, wearing blue and white judogi, practicing judo during a training in a gym.
    Antibodies attacking virus particles, computer illustration. — Stock Photo
    Antibodies attacking virus particles, computer illustration.
    Blue senior female silhouette showing spleen in body. — Stock Photo
    Blue senior female silhouette showing spleen in body.
    Side view of a Caucasian female judo player sitting in the gym, taking a break in training, reaching for a plastic bottle from a mat. — Stock Photo
    Side view of a Caucasian female judo player sitting in the gym, taking a break in training, reaching for a plastic bottle from a mat.
    Front view mid section of judoka wearing blue judogi, warming up before a training in a gym, striking a pose, punching the air. — Stock Photo
    Front view mid section of judoka wearing blue judogi, warming up before a training in a gym, striking a pose, punching the air.
    Mid section illustration of spleen in male body silhouette. — Stock Photo
    Mid section illustration of spleen in male body silhouette.
    Illustration of transparent blue silhouette of male body with colored spleen. — Stock Photo
    Illustration of transparent blue silhouette of male body with colored spleen.
    Front view mid section of judoka standing on gym mats, tying up the yellow belt of blue judogi. — Stock Photo
    Front view mid section of judoka standing on gym mats, tying up the yellow belt of blue judogi.
    Sandbags in rows at the water's edge to prevent erosion of the beach — Stock Photo
    Sandbags in rows at the water's edge to prevent erosion of the beach
    Illustration of figure of obese man with visible spleen. — Stock Photo
    Illustration of figure of obese man with visible spleen.
    Mid section of karate player performing karate stance in fitness studio — Stock Photo
    Mid section of karate player performing karate stance in fitness studio
    Karate fighter practicing with wooden dummy in fitness studio. — Stock Photo
    Karate fighter practicing with wooden dummy in fitness studio.
    Illustration of antibodies (blue) attaching to a viral (purple) infected cell. Antibodies bind to specific antigens, for instance viral proteins displayed on the surface of infected cells, marking them for destruction by phagocyte immune cells. — Stock Photo
    Illustration of antibodies (blue) attaching to a viral (purple) infected cell. Antibodies bind to specific antigens, for instance viral proteins displayed on the surface of infected cells, marking them for destruction by phagocyte immune cells.
    Man practicing with kung fu fan in fitness studio. — Stock Photo
    Man practicing with kung fu fan in fitness studio.
    Karate fighter practicing with sai weapon in fitness studio. — Stock Photo
    Karate fighter practicing with sai weapon in fitness studio.
    Kung fu fighter practicing martial arts in fitness studio. — Stock Photo
    Kung fu fighter practicing martial arts in fitness studio.
    Front view close up of a teenage mixed race female judoka wearing blue judogi, practicing with a judo jo stick during a training with a male coach in a gym. — Stock Photo
    Front view close up of a teenage mixed race female judoka wearing blue judogi, practicing with a judo jo stick during a training with a male coach in a gym.
    B-lymphocyte white blood cells — Stock Photo
    B-lymphocyte white blood cells
    Young adult karate player performing karate stance in fitness studio — Stock Photo
    Young adult karate player performing karate stance in fitness studio
    T-lymphocytes attacking a cancer cell — Stock Photo
    T-lymphocytes attacking a cancer cell
    Grey senior female silhouette showing spleen in body, illustration. — Stock Photo
    Grey senior female silhouette showing spleen in body, illustration.
    Lymphocytes attacking a cancer cell — Stock Photo
    Lymphocytes attacking a cancer cell
    3d illustration of antibodies attacking virus particles. — Stock Photo
    3d illustration of antibodies attacking virus particles.
    Neutrophil white blood cell and red blood cells, digital illustration. — Stock Photo
    Neutrophil white blood cell and red blood cells, digital illustration.
    Front view of a confident teenage mixed race female judoka wearing blue judogi, kneeling on mats in the gym, looking straight into a camera, before judo training. — Stock Photo
    Front view of a confident teenage mixed race female judoka wearing blue judogi, kneeling on mats in the gym, looking straight into a camera, before judo training.
    Portrait of boxer performing boxing stance in fitness studio — Stock Photo
    Portrait of boxer performing boxing stance in fitness studio
    Karate player performing karate stance in fitness studio — Stock Photo
    Karate player performing karate stance in fitness studio
    Female boxer wearing boxing gloves in boxing ring at fitness studio — Stock Photo
    Female boxer wearing boxing gloves in boxing ring at fitness studio
    Judokas practicing judo in a gym — Stock Photo
    Judokas practicing judo in a gym
    Boxer with gumshield performing boxing stance in fitness studio — Stock Photo
    Boxer with gumshield performing boxing stance in fitness studio
    Side view full body of soldier in camouflage outfit standing on knee before military service with small girl — Stock Photo
    Side view full body of soldier in camouflage outfit standing on knee before military service with small girl
    Transparent female body silhouette with yellow colored spleen, digital illustration. — Stock Photo
    Transparent female body silhouette with yellow colored spleen, digital illustration.
    Karate fighter practicing with long pole in fitness studio. — Stock Photo
    Karate fighter practicing with long pole in fitness studio.
    Illustration of cancer cell being attacked by white blood cells. — Stock Photo
    Illustration of cancer cell being attacked by white blood cells.
    Grey senior female silhouette showing spleen in body, illustration. — Stock Photo
    Grey senior female silhouette showing spleen in body, illustration.
    Monocyte and lymphocyte white blood cells in blood smear, digital illustration. — Stock Photo
    Monocyte and lymphocyte white blood cells in blood smear, digital illustration.
    Boxer performing boxing stance in fitness studio — Stock Photo
    Boxer performing boxing stance in fitness studio
    Portrait of confident female boxer leaning on boxing ring in fitness studio — Stock Photo
    Portrait of confident female boxer leaning on boxing ring in fitness studio
    Side view of a mixed race male judo coach and teenage mixed race female judoka, wearing blue and white judogi, practicing judo during a training in a gym. — Stock Photo
    Side view of a mixed race male judo coach and teenage mixed race female judoka, wearing blue and white judogi, practicing judo during a training in a gym.
    Front view of a mixed race male judo coach and teenage mixed race female judoka, wearing blue and white judogi, practicing judo during a training in a gym. — Stock Photo
    Front view of a mixed race male judo coach and teenage mixed race female judoka, wearing blue and white judogi, practicing judo during a training in a gym.
    Close-up of a macrophage, illustration. — Stock Photo
    Close-up of a macrophage, illustration.
    Bacterial infection in the blood stream — Stock Photo
    Bacterial infection in the blood stream
    Low angle of serious man in military uniform preparing for serve in military — Stock Photo
    Low angle of serious man in military uniform preparing for serve in military
    Side view of a mixed race male judo coach wearing white judogi, warming up before a training in a gym, striking a pose, punching the air. — Stock Photo
    Side view of a mixed race male judo coach wearing white judogi, warming up before a training in a gym, striking a pose, punching the air.
    Rear view of a teenage mixed-race male judoka wearing white judogi, warming up before a training in a gym, striking a pose, punching the air. — Stock Photo
    Rear view of a teenage mixed-race male judoka wearing white judogi, warming up before a training in a gym, striking a pose, punching the air.
    Brown bears sparing for salmon — Stock Photo
    Brown bears sparing for salmon
    Dendritic cells of immune system — Stock Photo
    Dendritic cells of immune system
    Side view close up of two focused teenage multi-ethnic female judokas wearing blue judogi, kneeling and bowing on mats in the gym before judo training. — Stock Photo
    Side view close up of two focused teenage multi-ethnic female judokas wearing blue judogi, kneeling and bowing on mats in the gym before judo training.
    Illustration on black of silhouette of obese woman with highlighted spleen. — Stock Photo
    Illustration on black of silhouette of obese woman with highlighted spleen.
    Karate fighter practicing with long pole in fitness studio. — Stock Photo
    Karate fighter practicing with long pole in fitness studio.
    Confident female boxer leaning on boxing ring in fitness studio — Stock Photo
    Confident female boxer leaning on boxing ring in fitness studio
    Neutrophil white blood cells, digital illustration. — Stock Photo
    Neutrophil white blood cells, digital illustration.
    3d illustration of lymphocytes attacking cancer cells in human body. — Stock Photo
    3d illustration of lymphocytes attacking cancer cells in human body.
    Structure of dog lymphatic system with lymph vessels, digital illustration. — Stock Photo
    Structure of dog lymphatic system with lymph vessels, digital illustration.
    Macrophage. Coloured transmission electron micrograph (TEM) of a macrophage cell. The cell's nucleus is red. Mitochondria (orange) in the cell's cytoplasm produce energy for the cell. Lysosomes (black) contain enzymes for digesting foreign particles. — Stock Photo
    Macrophage. Coloured transmission electron micrograph (TEM) of a macrophage cell. The cell's nucleus is red. Mitochondria (orange) in the cell's cytoplasm produce energy for the cell. Lysosomes (black) contain enzymes for digesting foreign particles.
    Young adult karate player performing karate stance in fitness studio — Stock Photo
    Young adult karate player performing karate stance in fitness studio
    Young adult karate player performing karate stance in fitness studio — Stock Photo
    Young adult karate player performing karate stance in fitness studio
    Lymphocyte white blood cell in blood smear, digital illustration. — Stock Photo
    Lymphocyte white blood cell in blood smear, digital illustration.