Step 1: Leg is cut, Step 2: Histamines are released from the damaged tissue, Step 3: Chemicals cause blood vessels expand to increase blood flow in the area - area becomes hot and red, Step 4: Blood vessels become ‘leaky’ to allow white blood cells into the affected area- this causes swelling, Step 5: White blood cells called phagocytes enter tissue via expanded vessels, Step 6: Phagocytes engulf and destroy pathogens  ,

Leaderboard

Visual style

Options

Switch template

Continue editing: ?