Complex sentence: Neutrophils phagocytise debris and bacteria, kill bacteria by releasing free radicals in what is called a'respiratory burst,' and cleanse the wound by secreting proteases that decompose damaged tissue.
Split into simpler sentences: Neutrophils phagocytise debris and bacteria and also kill bacteria by releasing free radicals in what is called a'respiratory burst'. They also cleanse the wound by secreting proteases that break down damaged tissue.