Question | Answer |
A Skeletal System function | The Skeletal System's basic functions are to have the strength and rigidity to support soft tissues. |
A Skeletal System function | Also, this system is set up for protection. For example, the Pelvic Girdle protects the reproductive organs; the skull protects the brain; and the ribs protect the heart and lungs. |
A Skeletal System function | Assists in movement by providing surfaces the muscles can pull on to cause movement. |
A Skeletal System function | Responsible for Mineral Homeostasis - Calcium and Phosphorous levels in blood. |
A Skeletal System function | Production of blood cells takes place in the skull, breast bone, ribs, vertebra, hips, elbow, knees (ends of arm &leg bones). |
A Skeletal System function | Stores Triglycerides in the yellow bone marrow. |
Five basic shapes of bone: | Long bones, short bones, flat bones, irregular bones, and sesamoid bones. |
Long Bones | Long and skinny ; Arms and legs. |
Short bones | Same length & width ; wrist and ankles. |
Flat bones | Thin & flat ; Skull, ribs & breast bone. |
Irregular bones | No distinct shape ; Hip bones & vertebra. |
Sesamoid Bones | Form on the inside of tendons / Not attached to any other bone ; Knee cap |
Sutures | Immovable connection between bones. |
Fontanels | Soft soft area with no bone. |
Paranasal Sinuses | Air cavities in the skull. |
Sutures | Prevents any type of brain damage from movable bones. |
Fontanels | Allows baby's skull to change shape to allow for easy vaginal delivery. |
Fontanels | Allows bones to spread to give brain room to grow. |
Paranasal Sinuses | Makes skull lighter. |
Paranasal Sinuses | Responsible for vocal residence &singing voice. |
Cervical Vertebrae | Neck |
Atlas | Cervical #1 - holds up brain / allows you to nod |
Axis | Cervical #2 - allows head to rotate. |
Thoracic Vertebrae | Only bones attached to ribs. |
Lumbar Vertebrae | Lower back / bear great stress & weight / attachment of back muscles. |
Sacrum | 5 fused vertebrae (to add stability to Pelvic Girdle) / Posterior wall of pelvic girdle |
Coccyx | 3-5 fused vertebrae / Tail bone |
Thoracic Cage | AKA - Rib Cage |
Components of the Thoracic Cage | Sternum, costal cartilage, ribs, thoracic vertebrae. |
Intervertebral Disks | Made from Fibrocartilage to cushion vertebrae. |
Scoliosis | Abnormal side to side curves. |
Kyphosis | "Hunch back" - Exaggerated curve in the upper back. |
Lordosis | "Sway back" - Exaggerated curve in the lower back. |
Pectoral Girdle | Attaches the arms to the torso. |
What bones make the Pectoral Girdle? | Scapula (Shoulder Blade), Clavicle (Collar Bone). |
Scapula | Shoulder Blade |
Clavicle | Collar Bone |
Pelvic Girdle | Attaches Legs to torso; Provides stable non-moving brace for entire body. |
What bones make the Pelvic Girdle? | Coxal Bones (Hip Bones) |
Coxal Bones | Hip Bones |