In the Main system the limbs are projected on the fingers and toes (without the thumbs).

The upper limbs are projected on the second and fifth finger (toe), and the lower – on the third and fourth finger and toe. The hands and feet are projected on the distal (first) phalanges of the fingers (toes). The forearms and shanks – on the middle phalanges of the fingers (toes). The armpits and thighs – on the proximal (third) phalanges of the fingers (toes). The knuckles correspond exactly to the joints of the hands and feet.

In the “Insect” system the limbs are presented in a bent position, on the side parts of the second and third phalanges of all the fingers and toes. The hands are projected on the side parts of the middle phalanges of the fingers (toes).