This library is built in the open.
If you spot an error, have a suggestion, or just want to say hello — we’d love to hear from you.

tists strive to give to their theoretical assertions regarding the constitution of man.
The human body presents us with three great centers: the abdomen, the chest, and the head, to each of which is attached a pair of limbs.
A schematic drawing of a human silhouette showing the nervous system or "great sympathetic." It highlights three main nerve clusters (plexus) along the spinal column, with branching fibers extending into the head, chest, and abdominal areas.
To the abdomen are attached the abdominal limbs (thighs, legs, feet); to the chest, the thoracic limbs (arms, forearms, hands); to the head, the cephalic limbs (lower jaw).
Each of these centers has a well-defined physiological function: the abdomen transforms food coming from the outside into human substance or chyle,