The simple types of CPR manikins come with breathing passageways that open once the head tilt or chin lift part of Cardio Pulmonary Resuscitation is performed properly. The chest goes up clearly when air is breathed into the mouth. It looks like a real human being. A number of models contain a perceptible clicker if the compression pressure is accurate.
There are also types of CPR training manikins for fundamental Cardio Pulmonary Resuscitation. However, these only have heads and bodies for adults. Advanced models are made of full bodies. Majority of these adult manikins are normal males while some are overweight males and females. Child and infant training manikins often come with complete bodies.
More intricate types of CPR manikins are designed for more sophisticated ACLS or cardiac life support training.
Advanced types of CPR training manikins have complete bodies even for the adult models and used for practice in all functions.