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Skeletal System 5 Major Functions: Read pages Support 1) ______ 12 - 19 -Vertebral Column 2) ________ Movement -Joints -Moveable - Shoulder, Hip -Immovable - Skull bones 3) ________ Protection -Cranium - protects brain -Rib cage - protects heart and lungs Production of blood cells 4) ___________________ -blood cells in red bone marrow 5) ______ Storage -Fat in yellow bone marrow osteocytes Bone cells are called ________ Skeletal System Bone cells are called osteocytes. Skeletal System Human babies have more than 300 bones at birth but by the time they reach adulthood there are only 206 bones because some have fused together. The bones of our hands and feet account for half of our total number of bones! One person in twenty is born with an extra rib. This is three times more likely to occur in males. 10. 1. 11. 2. 3. 21. 12. 13. 4. 14. 5. 15. 16. 17. 6. 18. 7. 8. 19. 9. phalanges 20. Interactive Skeleton phalanges Interactive Skeleton Human Body Body Systems & Homeostasis phalanges 10. 1. 11. 2. 3. 21. 12. 13. 4. 14. 5. 15. 16. 17. 6. 18. 7. 8. 19. 9. phalanges 20. Interactive Skeleton Read pages 24 - 28 Muscular System 600 There are ________ muscles in your body! move Function: to ________ the body and internal organs 2 Types of Muscle: Voluntary – 1. _____________ - under your control Involuntary – 2. _____________ - not under your control 3 Types of Muscle Tissue: Cardiac – 1. ___________ - found only in the heart - voluntary or involuntary? tendons Skeletal – 2. ___________ - attached to bones with __________ ligaments - attached to other muscles with ___________ - work in pairs, when one muscle _________ contracts the other _________ relaxes to its original length - voluntary or involuntary Smooth – 3. ___________ - work automatically to control certain movements inside your body - found inside internal organs including the stomach and blood vessels ________ - voluntary or involuntary? Muscular System There are about 60 muscles in the face. Smiling is easier than frowning – smiling uses 20 muscles and frowning uses 40 muscles! The longest muscles in the body is the sartorius, from the outside of the hip down and across to the inside of the knee. It rotates the thigh outwards and bends the knee. The smallest muscle in the body is the stapedius, deep in the ear. It is only 5 mm long and thinner than a cotton thread. It is involved in hearing. The biggest muscle in the body is the gluteus maximus, in the buttock. It pulls the leg backwards powerfully for walking, running and climbing steps. A. Tricep B. Pectoral C. Abdominal D. Sartorius E. Quadriceps F. Bicep G.Deltoid H. Latissimus dorsi I. Gluteus maximus J. Hamstring K. Gastrocnemius L. Achilles tendon