A rebel is defined as someone who opposes or rejects authority. A person engaging in a political rebellion is an example of a rebel. A youngster who defies his parents is an example of a rebel. To deliver oxygen to the body, the respiratory system collaborates with the circulatory system. Oxygen from the respiratory system enters blood arteries, which subsequently transport oxygen-rich blood to tissues and cells. The heart keeps this continuous flow of blood by pumping out more blood during periods of activity and relaxation through its valves. When stress factors such as anger, fear, or pain are experienced, the autonomic nervous system is activated. The sympathetic branch promotes blood circulation and acts as a "go" signal for survival. The parasympathetic branch restores us to a calm state by promoting digestion, eliminating waste, and regulating reproductive functions. 4. A rebellious person is one who resists authority, refuses to obey rules, and challenges existing values and customs. Such people usually engage in low-risk behaviors that do not threaten their livelihood or safety. They may be antisocial or simply act without considering the consequences of their actions. Examples of rebellious people include revolutionaries and outlaws. Rebels can be male or female, but most often they are young men under the age of 30. Rebellious men tend to defy their fathers and other male elders. Women rebels often reject their husband's authority and refuse to follow traditional gender roles. 5. The origin of the word "rebel" comes from the English language.