Skeletal System

Fact: The strongest bone in your body is the jaw-bone!
Picture
http://academic.kellogg.edu/herbrandsonc/bio201_mckinley/f6-4c_gross_anatomy_of__c.jpg

Functions

Although you never see your bones, and hopefully never will, they are still very much alive and serve as a very important part of keeping your body together, pun intended. The functions that the skeletal system serves in your body are:

  • Structural support
  • Protection of vital organs from physical force
  • Production of red blood cells
  • Links with ligaments and joints to provide efficient movements
  • Storage of salts and minerals

Categories of Bone

Picture

Axial and Appendicular Skeletons

Picture
http://www.exercisereports.com/category/reference/anatomy-physiology/skeletal-system/
 AXIAL SKELETON (80) - Protective Bones
Cranium (8)
Frontal (1), Parietal (2), Temporal (2), Sphenoid (1), Ethmoid (1), Occipital (1)

Facial Bones (14)
Mandible (1), Maxilla (2), Zygomatic (2), Nasal (2), Lacrimal (2), Palatine (2), Inferior Nasal Concha (2), Vomer (1)

Hyoid in neck (1)

Ear Ossicles (6)
Malleus (2), Incus (2), Stapes (2)

Vertebral Column (26)
Cervical Vertebrae, C1-C7 (7)
Thoracic Vertebrae, T1-T12 (12)
Lumbar Vertebrae, L1-L5 (5)
Sacrum, S1-S5 (5 fused into 1)
Coccyx (4 fused into 1)

Thorax (25)
Sternum (1)
True Ribs – 7 each side (14)
False Ribs – 3 each side (6)
Floating Ribs – 2 each side (4)

APPENDICULAR SKELETON (126) - Limbs and other bone appendages
Shoulder Girdle or Pectoral Girdle (4)
Clavicle (2)
Scapula (2)

Upper Limb (60)
Humerus (2)
Ulna (2)
Radius (2)
Carpals (16)
Scaphoid ()
Trapezium (2)
Capitate (2)
Trapezoid (2)
Lunate (2)
Triquetrum (2)
Pisiform (2)
Hamate (2)
Metacarpals – 5 on each side (10)
Phalanges – thumb (pollox 2X1), others 3X4 on each side (28)

Hip or Pelvic Girdle (2)
Coxal Bone (os coxae) are 3 fused pairs:
Ilium, Ischium, Pubis

Lower Limb (60)
Femur (2)
Patella, Knee Cap (2)
Tibia (2)
Fibula (2)

Tarsals (14)
Talus (2)
Calcaneus (2)
Cuboid (2)
Navicular (2)
Medial Cuneiform (2)
Intermedius Cuneiform (2)
Lateral Cuneiform (2)

Metatarsals – 5 on each side (10)
Phalanges – toe (hallux 2X1), others 3X4 on each side (28)