Human Anatomy: The Skeleton

The Spine: Structure and Function

• The spine is the body's central axis, also known as the axial skeleton.
• It supports the head and transmits the weight of the body to the pelvis.
• The spinal column consists of 33 bones called vertebrae.
• Soft discs between vertebrae prevent friction and act as shock absorbers during jumps.
• Key Functions of the Spinal Column:
  • Protects the spinal cord, which carries nerves down the center of the body.
  • Maintains upright posture through the support of abdominal and spinal muscles.
  • Supports the head, ribs, and hips.
  • Absorbs the shock of movement, especially during jumps.
  • Gives shape to the body through the curves of the spine.

Safe Dance Practice for the Spine

• Correct Technique:
  • Ensure proper body alignment.
  • Maintain correct foot placement, using the three points of the foot.
• Strengthen Core Muscles:
  • Strengthen abdominal muscles to support the spine.
• Lifting Technique:
  • Use proper lifting technique when working with a partner.
• Jumping Technique:
  • Start and end jumps with a demi plié (half bend of the knees).
• Floor Surfaces:
  • Avoid practicing on surfaces that lack impact absorption.

Spinal Sections and Curves

• Cervical Vertebrae:
  • 7 vertebrae in the neck.
  • Form a curve in the neck.
• Thoracic Vertebrae:
  • 12 vertebrae in the upper back.
  • Form a curve in the upper back.
• Lumbar Vertebrae:
  • 5 vertebrae in the lower back.
  • Form a curve in the lower back.
• Sacral Vertebrae:
  • 5 vertebrae fused together.
• Coccygeal Vertebrae:
  • 4 vertebrae forming the coccyx, fused together.

This quiz tests your knowledge about the human skeleton, including its main functions, components, and how it protects vital organs. Challenge yourself to answer questions about the number of bones and the classifications within the axial skeleton.