[ComfortEagle]

Take an Anatomy class. The femoral artery runs mainly on the inside of the upper leg(hence the recognition of femur or some may call it the thigh bone in the name when describing this aretery ) and branches out. It is one of the more crucial areteries in the body because of the amount of blood that it passes through the human body. When he was shot it was severed, causing the massive amount of blood loss.

Yes, and the doctors even had to open up his chest to operate, that's how bad it was.