Final answer:
The suffix -itis at the end of most disorders indicates inflammation of a particular organ or type.
Step-by-step explanation:
The suffix -itis indicates inflammation of a specific organ or type. This is a physiological response to injury, which can limit damage, eliminate the injury cause, and initiate repair of damaged tissue. Chronic inflammation can lead to diseases such as arthritis and tuberculosis, with peritonitis being the inflammation of the peritoneum, and meningitis referring to the inflammation of the meninges. In contrast, infection is the invasion of an organism's body tissues by disease-causing agents, their multiplication, and the reaction of host tissues to these organisms. Depression is a mood disorder characterized by a persistent feeling of sadness and loss of interest. Degeneration refers to the process of deterioration or loss of function in the cells or tissues.