Immune response

Immune response

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Caption: Immune response. Artwork of the immune system's response to a thorn (brown, centre left) that has pierced the skin. Mast cells (green, centre left) release histamine (red spheres), which causes inflammation at the site of the injury. Bacteria (dark red) are ingested and destroyed by macrophage white blood cells (pale blue, lower left). Antibodies (Y-shaped, purple) are produced or arrive at the site in the bloodstream (lower centre). Antibodies bind to antigens on the bacteria, in a process called opsonization. In this way, the immune system labels the bacteria for engulfment and digestion by neutrophil white blood cells (pale blue, lobed nucleus).

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Keywords: anatomy, antibodies, antibody, antigens, artwork, bacteria, bacterial, capillaries, capillary, cells, corpucsles, corpuscle, cut, defence, dermal, dermis, epidermal, epidermis, erythrocyte, erythrocytes, foreign body, hair follicle, healthy, histamine, human body, illustration, immune system, immunology, inflammation, inflammatory, injury, leucocyte, leucocytes, leukocyte, macrophage, macrophages, mast, meissner's, merkel's disc, nerve endings, neutrophil, neutrophils, normal, object, opsonisation, opsonising, pacinian, phagocyte, phagocytosing, phagocytosis, physiology, pierced, prickle, protective, red, response, sebaceous, sensory, skin, sweat gland, thorn, white blood cell, wound

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