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Objectives

Section 11.1. Your Skeletal System. Objectives. Identify the five main roles of the skeletal system. Explain how you can keep your skeletal system healthy. Functions of the Skeletal System. Your skeletal system has five main roles. provides support. protects internal organs.

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Objectives

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  1. Section 11.1 Your Skeletal System Objectives Identify the five main roles of the skeletal system. Explain how you can keep your skeletal system healthy.

  2. Functions of the Skeletal System Your skeletal system has five main roles. • provides support • protects internal organs • allows your body to move • stores and produces materials that your body needs

  3. Support and Protection • Your skeleton is made up of all the bones inyour body. • *Your skeleton gives your body its basic shape and provides the support that you need. • *Many bones of the skeletal system protect internal organs.

  4. Movement *In coordination with your muscular and nervous systems, your skeletal system allows you to move.

  5. Storage and Production of Materials • *Your bones store essential substances which are released when other parts of the body need them. • *Some bones also produce blood cells.

  6. Skull The Skeletal System 9 1) Sternum (breastbone) 10 1 2) Vertebral column (backbone) 11 12 12) Ribs 3) Carpals 2 13 13) Radius 4) Metacarpals 14 15 14) Ulna 5) Phalanges 3 4 15) Pelvic girdle 6) Tarsals 5 16 16) Femur 7) Metatarsals 17 17) Patella 8) Phalanges 18 19 18) Fibula 9) Clavicle (collarbone) 10) Scapula (shoulder blade) 19) Tibia 6 7 11) Humerus 8

  7. Development of Bones • Your bones are living structures that undergo change throughout your life. • Cartilage is a tough supportive tissue that is softer and more flexible than bone. • By young adulthood, most of this cartilage is replaced by bone in a process called ossification(ahs uh fih KAY shun). • In a process called ossification minerals, such as calcium and phosphorus, are deposited within the cartilage, making it hard.

  8. Structure of Bones • Bone consists of two different types of tissue—compact bone and spongy bone. • Another type of tissue called marrow fills the spaces in bones. • *There are two types of marrow—red and yellow. • Red Makes Red Blood Cells • Yellow stores fat cells

  9. Eating Well • Adequate intake of calcium and phosphorus will help your bones grow to their maximum size and strength. • *Osteoporosis is a condition in which the bones become weak and break easily.

  10. Exercising Calcium RDA (Recommended Daily Amount) • *Another way to build strong bones and prevent osteoporosis is to get plenty of weight-bearing exercise. • *Activities in which the bones support the entire weight of your body help your bones grow strong and dense.

  11. Medical Conditions of the Spine • *Scoliosis (skoh lee OH sis), an abnormal curvature of the spine. • *Lordosis, an abnormal arch in the lower back (lumbar) • i.e. Swayback • *Kyphosis, a posture problem characterized by rounded shoulders and sunken chest

  12. Skull The Skeletal System 9 1) Sternum (breastbone) 10 1 2) Vertebral column (backbone) 11 12 12) Ribs 3) Carpals 2 13 13) Radius 4) Metacarpals 14 15 14) Ulna 5) Phalanges 3 4 15) Pelvic girdle 6) Tarsals 5 16 16) Femur 7) Metatarsals 17 17) Patella 8) Phalanges 18 19 18) Fibula 9) Clavicle (collarbone) 10) Scapula (shoulder blade) 19) Tibia 6 7 11) Humerus 8

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