Ball Python Anatomy

Outer Structure:
Unlike most reptiles, snakes do not have legs or a pectoral girdle (shoulder bones). With the exception of boids, which retain a vestigial pelvis and external spurs, they also lack a pelvic girdle.

Scales and Shedding (Ecdysis):
Snakes are covered with scales that protect them from injury and dehydration. These can be smooth and shiny (like a python) or rough and dull (like a hognose). The epidermis is the thin outer layer shed regularly, while the thicker dermis below contains color-providing chromatophores. As snakes grow throughout their lives, new scales form beneath the old ones. The shedding process, called ecdysis, usually occurs in one piece, inverting like a sock. Incomplete sheds coming off in shards may indicate health or husbandry issues like improper temperature or humidity.

Scale Types and Function:
- Dorsal Scales: Smaller scales covering the top and sides, often overlapping like shingles.

- Scutes: Wide scales on the belly that act like ladder rungs to assist in movement.

While scales cannot stretch, the soft skin between them folds inward, allowing the body to expand when consuming large meals.

Eyes and Spectacles:
Snakes lack eyelids. Instead, a transparent scale called a spectacle protects each eye. During ecdysis, this spectacle turns opaque blue (known as being "in the blue") before becoming clear again just before shedding. It is critical to ensure these "eye caps" are successfully removed during every shed to prevent vision damage.