Skeletal System 4 Functions of the Skeletal System 1. Supports the body. The backbone is the main support center for the upper body. It holds your head up and protects your spinal cord. 2. Protects internal
organs: The bones of your skull protect your brain. Your ribs protect your lungs and heart from injury Muscle attached to bones!! 4 Functions of the Skeletal System 3. Works with Muscles to
produce movement: Skeletal system provides points of attachment for muscles. Your legs and arms move when the muscles pull on the bones. 4. Makes Blood: Red and white blood cells are formed by tissue called marrow, which is in the center of the bone.
Bone Structure Typical Four Layers: Periosteum: Covers Bones Compact Bone: Lies beneath the periosteum Spongy Bone: Lies beneath the compact bone
Bone Marrow: Fills the gaps between the spongy bone Spongy Bone Compact Bone Bone Marrow /Marrow Cavity Bones of the Cranium Some are thicker
than others!!! Parietal Bone Cranium Bones Parietal Bone Frontal Bone
Occipital Bone Temporal Bone Cranium Picture from http://www.buzzle.com/articles/labeled-human-skeleton-diagram.html Mandible The mandible is the largest and
strongest bone of the face. ? What else is it called? Maxilla Cranium Mandible
Picture from http://www.buzzle.com/articles/labeled-human-skeleton-diagram.html Clavicle or Collarbone The clavicle, or collar bone, holds the shoulder joint away from the rest of the upper body and is only as thick as your little finger. Cranium
Mandible Picture from http://www.buzzle.com/articles/labeled-human-skeleton-diagram.html Clavicle Scapula The scapula is located on the back side of the ribcage and helps provide part of the
shoulder joint and movement for the arms. Cranium Scapula Picture from http://www.buzzle.com/articles/labeled-human-skeleton-diagram.html Mandible Clavicle
Vertebral column Also known as the spine, or vertebrae. A column usually consisting of 24 articulating vertebrae Cranium Scapula
Vertebrae Picture from http://www.buzzle.com/articles/labeled-human-skeleton-diagram.html Mandible Clavicle Coccyx and Sacrum Cranium
Scapula Vertebrae Coccyx Sacrum Picture from http://www.buzzle.com/articles/labeled-human-skeleton-diagram.html Mandible Clavicle
Humerus (Upper Arm Bone) Cranium Scapula Humerus Vertebrae Coccyx Sacrum Phalanges Picture from http://www.buzzle.com/articles/labeled-human-skeleton-diagram.html
Mandible Clavicle Radius and Ulna Radius on Top Ulna on Bottom Cranium Scapula
Metatarsales Picture from http://www.buzzle.com/articles/labeled-human-skeleton-diagram.html Tarsales Phalanges The Connectors of the Body Ligaments: Connect bone to bone
The Connectors of the Body!! Tendon: Attaches muscles to bones The Connectors of the Body Cartilage: It acts as a cushion between bones at a joint and protects the bones. Joints of the Body Ball and Socket Joint: Round end of bone fitting
snuggly within another bone. Ex. Shoulder and Hip Joints of the Body Hinge Joint: Movement at joint in one direction like a door. Ex. Knee and Elbow
Joints of the Body Pivot Joint: one bone rotates in the ring of another bone. Ex. Neck, Wrist and Ankles Joints of the Body Gliding Joint: Bones glide over another bone.
Ex. Knuckles Problems of the Skeletal System Fracture: Break Dislocation: Out of joint Problems of the Skeletal System Sprain: Swelling in
the joint Arthritis: Inflamed and stiff joints Problems of the Skeletal System!! Scoliosis: Curvature of the spine Osteoporosis:
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