Function and Service of the Muscles.

Thumb. There are two muscles that straighten it, starting in the humerus (26) and one inserted in the third joint, the other with various parts of a split tendon in different parts of the thumb. There are three muscles that pull it, and these together make the fleshy base of the hand, starting from the middle of the palm (30) and inserted around the second joint of the thumb. These pull one after the other, bending the thumb with great force towards the fingers. The muscles that turn the thumb away from the fingers are equal in number, but are not or are very little seen. Which can be ascertained somewhat from the indications of our sketches. See Picture A, where a hand is shown from inside, and in Picture C, a hand from outside. Although the small proportion does not allow to clearly show all the parts and muscles as clearly as those of the larger parts, the muscles that are at the hand of the Picture a marked with a. b. indicate which pulls the small finger aside, and which bends the thumb.

Function and Place of the Muscles of the Chest and Abdomen.

35. The sternum or lobster of the chest, of which was spoken in the explanation of the bones under the number (3). Those who are naturally hot, strong, and courageous of spirit, the chest is entirely rough and armed with short curly hair beneath the sternum. This observed in the images where it may be appropriate, namely to slaves, strong laborers, and worn out old.

Translation Notes:
- "Maaxel": Function.
- "Dienft": Service.
- "Muskelen": Muscles.
- "Borft": Chest.
- "Buyk": Abdomen.
- "Kreeft": Lobster – a symbolic representation of the sternum.