Labeled Human Skeletal System Diagram

Human Skeletal System Diagram

Here are the main parts of Human Skeletal System:

Axial Skeleton

• Skull: Protects the brain and houses sensory organs like eyes, ears, and nose.
  • Cranium: Composed of eight bones fused together, forming the braincase.
  • Facial bones: Fourteen bones that make up the face, including the jaw, cheekbones, and eye sockets.
• Vertebral column (spine): Provides support and flexibility. It protects the spinal cord.
  • 24 vertebrae divided into five regions: cervical (neck), thoracic (chest), lumbar (lower back), sacrum (pelvis), and coccyx (tailbone).
  • Intervertebral discs cushion the vertebrae and absorb shock.
• Rib cage: Encloses and protects the vital organs in the chest cavity (heart, lungs).
  • 24 ribs attached to the thoracic vertebrae, some directly to the sternum (breastbone).

Appendicular Skeleton

• Pectoral girdle (shoulder): Connects the arms to the axial skeleton.
  • Clavicle (collarbone) and scapula (shoulder blade) form the shoulder joint.
• Upper limbs
  • Humerus (upper arm bone).
  • Ulna and radius (forearm bones).
  • Hand bones: carpals (wrist), metacarpals (palm), and phalanges (fingers).
• Pelvic girdle (hip): Connects the legs to the axial skeleton.
  • Two innominate bones (each fused from ilium, ischium, and pubis) form the pelvis.
• Lower limbs
  • Femur (thigh bone).
  • Patella (kneecap).
  • Tibia and fibula (lower leg bones).
  • Foot bones: tarsals (ankle), metatarsals (sole), and phalanges (toes)