CHAPTER IV

THE REACTIONS OF THE TISSUES OF THE BODY TO INJURIES.--INFLAMMATION.-- THE CHANGES IN THE BLOOD IN THIS.--THE LMIGRATION OF THE CORPUSCLES OF THE BLOOD.--THE EVIDENT CHANGES IN THE INJURED PART AND THE MANNER IN WHICH THESE ARE PRODUCED.--HEAT REDNESS SWELLING AND PAIN.--THE PRODUCTION OF BLISTERS BY SUNBURN.--THE CHANGES IN THE CELLS OF AN INJURED PART.--THE CELLS WHICH MIGRATE FROM THE BLOOD VESSELS ACT AS PHAGOCYTES.--THE MACROPHAGES.--THE MICROPHAGES.--CHEMOTROPISM.--THE HEALING OF INFLAMMATION.--THE REMOVAL OF THE CAUSE.--CELL REPAIR AND NEW FORMATION.--NEW FORMATION OF BLOOD VESSELS.--ACUTE AND CHRONIC INFLAMMATION.--THE APPARENTLY PURPOSEFUL CHARACTER OF THE CHANGES IN INFLAMMATION 79