is the medulla oblongata part of the reticular formation?

My textbook states that the medulla oblongata is a portion of the brain stem that helps to regulate cardiovascular and respiratory functions including heart rate, respiration rate, and homeostatic activities (like the pH of the blood).

It also states that the reticular formation is a diffuse network of neurons found throughout the brain stem that oversees respiration and circulation and helps to separate important signals to the brain from unimportant signals (hence why we can block out certain odors after a while).

So... is the medulla oblongata part of the reticular formation?