How Many Health bars are in Fallout 3?

In Fallout 3, health is represented by a single health bar that depletes as the player's character takes damage. There are no separate health bars for different body parts, but players can monitor their health through the HUD. Additionally, the game features a "Rad" meter for radiation damage, which can also affect overall health. Players can restore health using items like stimpaks or through other healing methods.