Human body of different cavities, separated areas which house different organ systems. The brain and central nervous system reside in an area protected from the rest of the body by the blood brain barrier. The lungs sit in the pleural cavity. The intestines, liver, and spleen sit in the abdominal cavity Height, weight, shape and other body proportions vary individually and with age and sex. Body shape is influenced by the distribution of muscle and fat tissue. Human physiology is the study of how the human body functions. This includes the mechanical, physical, bioelectrical, and biochemical functions of humans in good health,
Mermaids: The Body Found is an example of what is known as docufiction, in which documentary style and programming elements are combined with fictional - or sometimes less egregiously speculative - science and fiction. This type of programming receives particular criticism when, as in the original broadcast of "Mermaids: The Body Found", there are only a few, easily missed disclaimers to indicate the speculative nature of the programming. On the contrary, the serious tone of the majority of the presentation implied that it was a factual documentary. The first airings of the two "Mermaids" programs apparently fooled millions of people and also drew some