Book 32, Question 3
How are a snake’s ribs different from yours?
You have about twelve pairs of ribs that curl around your chest and meet at a breastbone.
A snake has no breastbone, and its ribs run along almost its whole body, from just behind the head to near the tail. The ribs end in loose tips, so the body can stretch wide. Muscles link the ribs to the belly scales, which helps the snake move.