Lesson 1 &2_Skeletal andMuscularSystem.pptx

Skeletal and Muscular System

1. Activity: THE SKELETON DANCE https://www.youtube.com/watch?v=Jpvuqj5nv6U

2. Skeletal System

3. What is Skeletal S ystem? The skeletal system is one of the body’s major organ systems. All vertebrates (animals with backbones), including humans, have a skeletal system. It gives the body shape, protects vital organs, and provides a system of levers—operated by muscles—that enable the body to move. . Collection of bones, joints, ligaments, and cartilage that provides a framework for the body.

4. The Human Skeleton Bones Cartilage Ligaments

5. 7 Tissues -  several specialized tissues make up the parts of the skeletal system. They include (1) bones, (2) cartilage, and (3) ligaments. Bones-  are located throughout the skeletal system where strength and stability are needed. Bones provide rigid structure for the body. They also contain bone marrow, the tissues that form blood. In addition, bones store such essential minerals as calcium, iron, magnesium, and phosphorus.

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7. 9 Cartilage -  is a bluish-white rubbery tissue found at the ends of long bones and between the   vertebrae  (bones of the  spine). Cartilage cushions bones against shock and prevents them from rubbing against one another. Cartilage is also located in certain places where flexibility is important, such as the tip of the nose and the outer ear. Some vertebrates, such as sharks, lack bones entirely and have skeletons made up primarily of cartilage. Ligaments -  are strong bands of fibrous tissue that fit bones together and hold them in place. Ligaments provide stability at joints.

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9. Strong and Important Bones The skeletal system has a lot to do. People can help their bones stay strong.

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11. Functions of The Skeletal System 1 . Support 2. Protection 3. Movement 4. Storage 5. Blood Cell Production

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19. 23 the collection of over 600  skeletal muscles  that enable the human body to move. Skeletal muscles are attached to the bones of the skeletal system. They provide the force to produce movement at joints. The muscular system is one of the body’s major organ systems. Muscular System

20. 24 skeletal muscles work by  contracting  (drawing together). ORIGIN – end of the muscle attached to the bone that doesn’t move when the muscle contracts. INSERTION - attached to a bone that moves when the muscle contracts. Naming Muscles: f rom their location, origin, number of origins, and insertion. f rom the muscle's shape and size, the direction of the muscle fiber, and the function of a muscle

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23. 27 The muscles of the muscular system are all  voluntary  muscles VOLUNTARY MUSCLES are those that operate under conscious control.

24. 30 Most skeletal muscles attach to two different bones and cross a moveable space or joint. When a muscle contracts, it gets shorter, pulling one bone closer to the other. For example, the biceps brachii muscle has its origin on the  scapula  ( shoulder blade ) and its insertion on the radius,  one of the bones in the forearm.  Movement