3TEST YOUR KNOWLEDGE...How many bones make up the Skeletal System?
4BONESWhat are they?Each bone is a complex living organ that is made up of many cells, protein fibers, and minerals.50% water and 50% solid matterEach bone gives a point of attachment for the muscles so that they may serve as levers and make movements possible.
5VERTEBRAE 33 vertebrae that form the vertebral column Surrounds and protects your spinal cordBy region:Cervical (neck) - 7 vertebraeThoracic (chest) - 12 vertebraeLumbar (lower back) - 5 vertebraeSacrum - 5 vertebraeCoccyx (tailbone) - 4 verterbrae
7VERTEBRAEEach vertebra is named for the first letter of its region, and its position along the spineExample:Thoracic vertebrae: T1 - T12
8RIBS AND STERNUMA thin knife-shaped bone located along the midline of the anterior side of the thoracic regionThe sternum connects to the ribs by thin bands of cartilage- costal cartilageYour ribs surround and protect your heart, liver and lungs
18BONESWhat disease is most associated with bones?
19OSTEOPOROSIS What is it? Causes bones to become weak and brittle Occurs when the creation of new bone doesn’t keep up with the removal of old bone
20OSTEOPOROSIS What causes it? When there isn’t enough calcium in the bloodstream, the body attempts to pull calcium from the bonesThis thins and weakens bones, which leads to breaks and fractures- frequently in the hip, wrist or spineMost common in women and the elderly
21OSTEOPOROSIS Affects 10 million Americans- mostly women Additionally, 18 million Americans already have low bone mass (osteopenia) which places them at high risk for developing osteoporosisBy the age of 20, the average young person has acquired roughly 98% of his/her skeletal mass
24HOW DO WE PREVENT IT? Weight-bearing exercise Tai chi, yoga, walking, dancing, strength trainingA diet rich in calcium and vitamin DDark leafy greens, white beans, milk, enriched breads and grains, fatty fish