Skeletal System

Skeletal System

1. Skull

   • Protects the brain
   • All bones are fixed except the lower jaw

2. Backbone (Spine/Vertebral Column)

   • Made of 33 small bones called vertebrae
   • Protects spinal cord that is connected to the brain
   • These bones help in bending, twisting, and turning

3. Ribcage

   • Protects heart and lungs
   • Made of 12 pairs of long curved bones called ribs
   • 10 pairs of ribs joined to the front bone called the breastbone or sternum
   • 2 pairs not attached to the breastbone- floating ribs

4. Limbs (Arms and Legs)

   • pair of arms- forelimbs
   • pair of legs-hindlimbs
   • Thigh bone in the leg is called femur
   • Femur is the longest bone in the body