Indy's Health Meter appears in the upper left corner of the screen. At full strength, the bar is green, and it gradually works its way to red as Indy absorbs punishment.

Pistol shots, punches, and energy bolts are obvious sources of danage, but you must pay attention to more subtle dangers, like falling.

A big drop will liely wipe Indy out, but even a moderate fall extracts a measure of health.

Your best preventive measures for this type of damage are to hang and drop, rather than leap off ledges.