What does level failed mean?

What structure connects the pharynx and trachea? How might smoking be turned into an advocacy project in your community? Do arteries and veins transport blood cells? Is the disease curable? What causes chondromatosis? How air moves into and out of the lungs? What soft material is found inside the cavity of a bone? Your period is almost 3 weeks late but you now have extremely light bleeding is this a period I've had blood tests and I'm definitely not pregnany I just wonder whether to class this as a period? How long does it usually take to form an addiction? What cause nose breeding? Can a transplanted kidney work for many years? What is a bilateral cysts? Is it possible for a woman to have muscular dystrophy? What do they mean when they say that the distal articulation of the tibia and fibula? What blood vessels drain blood into the rigth atrium? What happens to your body if the fever gets too high? What is the most common type of schizophrenia? What is meant by ripening of cheese and what causes it? Are all men autistic more then woman? What body plane is the liver located in?

What does level failed mean?