1. The first diagram indicates a splinter pricking deep in the skin and bacteria invading the tissue. In response to these, histamines are produced. The skin, splinter, bacteria, histamines and capillary are labeled in the diagram. The description below the diagram reads ‘In response to the wound and invading pathogens, mast cells release histamines, which stimulate increased blood flow to the area.’
2. The second diagram indicates wound caused because of the splinter and the presence of bacteria and histamines in the tissue. The phagocytes indicated as blue circular cells move into the tissues from the capillaries. The capillary is inflamed. Phagocytes are labeled in the diagram. The description below the diagram reads ‘Local blood vessels dilate. Fluid leaves the capillaries and causes swelling. Phagocytes move into the tissue.’
3. The thirds diagram indicates the destruction of bacterial cells. The phagocytes engulf the bacterial cells and destroy them. The capillary becomes normal in size. The description below the diagram reads ‘Phagocytes engulf and destroy the bacteria and damaged cells.’