2014 muscular and skeletal system

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Transcript of 2014 muscular and skeletal system

  • 1.03/25/14 1 The Skeletal and Muscular Systems

2. Todays Warm-Up Skeletal facts 1. How many bones are in the average adult human body? 2. How many bones does a baby have? 3. What/where is the longest bone on the body? 4. What/where is the smallest bone in the body? 206 Over 300! The femur or thighbone 3 bones in the middle ear- stirrup, anvil & hammer 3. Function The skeletal system includes bones and tissues that are important for supporting, protecting, and moving your body. 4. Parts of the skeletal system Bones (skeleton) Cartilage Joints: hold bone together & mobility Ligaments & Tendons 5. Your skeletal system is made up of the appendicular and axial skeletons. The skeletal system protects, supports, and moves the body. 6. The appendicular skeleton includes legs, arms, feet and hands. allows for movement includes bones called girdles that connect limbs to body 7. The axial skeleton includes the skull, rib cage, and spinal column. skull rib breastbone vertebra supports body and protects tissues allows for limited movement 8. cushions bones allows for smooth movement (damaged cartilage leads to joint pain) connects two bones As you age much of your cartilage is gradually broken down & replaced by bone Cartilage is connective tissue between bones. 9. Bones connect to form joints. Joints are places were two bones meet. There are three types of joints. Immoveable or fibrous, which does not allow for movement fibrous joint 10. Bones connect to form joints. Joints are places were two bones meet. There are three types of joints. cartillage Semi-moveable or cartilaginous, which allows partial movement 11. Bones connect to form joints. Moveable or synovial, which allows for greater movement Joints are places where two bones meet. There are three types of joints. 12. Ligaments are long bands of tissue that connect bones across a joint. ligament 13. Bones are living tissue. Bone is made of compact bone tissue and spongy bone tissue. Compact bone Spongy bone 14. Compact bone is hard and dense. Osteocytes (bone cells) maintain compact bone rings. Haversian canals allow blood vessels in the bone. osteocytes blood vessel Haversian canals 15. Spongy bone protects red or yellow bone marrow. Red bone marrow produces blood cells. Yellow bone marrow is mostly fat. Periosteum A layer of connective tissue that covers bone Red bone marrow 16. The Muscular System 17. Function Muscles are tissues that can contract, enabling movement. 18. They provide movement and force. There are 3 types of muscle tissue: - skeletal, - smooth, - cardiac Muscle tissue is made up of muscle fibers Most muscles work in pairs Muscles make up the bulk of the body and account for 1/3 of its weight. 19. What are muscles made of? Thousands, or even tens of thousands, of small fibers make up each muscle. 20. Humans have three types of muscle. The muscular system moves substances throughout the body. bones of the skeletal system food through digestive system blood through circulatory system fluids through excretory system 21. skeletal muscle There are three types of muscle tissue. SKELETAL MUSCLE CARDIAC MUSCLESMOOTH MUSCLE smooth muscle cardiac muscle 22. Skeletal Muscles Skeletal muscles attach to bones by tendons (connective tissue) and enable movement. Skeletal muscles are mostly voluntary Feel the back of your ankle to feel your Achilles tendon - the largest tendon in your body. 23. move food through digestive organs empty liquid from the bladder control width of blood vessels Smooth muscle lines organs and is involuntary. Smooth muscle around this artery allows the artery to regulate blood flowby shrinking and expanding. SMOOTH MUSCLE 24. pumps blood throughout body contains more mitochondria than skeletal muscle cells Cardiac muscle is found only in the heart. CARDIAC MUSCLE 25. How the Heart is Different How is the heart different from other muscles? It is part of both the Muscular System and the Circulatory System. It is responsible for circulating blood throughout the body. It has its own pacemaker for rhythmic beating. 26. muscle fiber Muscles contract when the nervous systems causes muscle filaments to move. Muscle fibers are cells of the muscular system. muscle 27. Muscle pairs: Muscles are grouped together in pairs on your skeleton Relaxed or contracted: When one muscle of a pair contracts, the other relaxes Pulling muscles: Skeletal muscles only pull in one direction. For this reason they always come in pairs. When one muscle in a pair contracts, to bend a joint for example, its partner then contracts and pulls in the opposite direction to straighten the joint out again. 28. Todays Warm-up Muscle Trivia How many muscles are in the average adult human body? What is the strongest muscle in the body? What is the largest muscle in the body? Approximately 650 Debatable, but many say the masseter (jaw). The gluteus maximus in your rear end (buttocks). 29. Todays Close Heres one flexible guy and strong dude In control of both his skeletal and muscular systems Robot Dancing Amazing Strength Break-Dancing http://www.youtube.com/watch?v=B9JZbqoR0Kg