Skeletal System

• Functions


  Framework

  Attachment

  Protection

  Movement
• Compact Bone Tissue


  Outer hard shell of the bone

  Framework
• Cancellous Bone Tissue 


  Spongey inner part

  Spaces to allow blood vessels
• Bone Marrow


  Red + Yellow

  Red - Where blood cells are formed
• Axial Skeleton

  Supports Skull, Neck, Spine
• Appendicular Skeleton 


  Supports limbs and attached them to body
• Flat Bones


  Protects internal organs

  E.g Scapula
• Irregular Bones


  Protects internal organs

  E.g Vertabrea, Pubis
• Long Bones

  Supports body weight

  E.g Femur
• Short Bones


  Provide Stability

  E.g Carpals + Tarsals
• Seasmoid

  Embedded in tendon to protect from stress

  E.g Pisiform, Patella
• Erythrocytes


  (RBC)

  Once matured after leaving the bone marrow, they ate reps eased to blood stream. Carry Oxygen.
• Leukocytes


  (WBC)

  Help protect body against disease
• Thrombocytes


  (Platelets)

  Blood Clotting
• Functions of the Sinuses


  Reduce weight off head

  Secrete mucus to trap dust

  Provider buffer against blows to face
• Examples of Sinuses (4)

  Maxillary

  Frontal

  Ethmoidal

  Sphenoidal
• Shoulder Girldle


  Clavicle + Scapula
• Vertebral Coloumn


  (Atlas, Axis)

  Cervical - 7

  Thoracic - 12

  Lumbar - 5

  Sacrum - 5

  Coccyx - 4
• Functions of Vertebral Column


  Provides Strength and stability

  Careys body weight

  Protects nerves of spinal cord
• Pelvic Girdle

  Pubis

  Illium

  Ishium