Muscular and Skeletal Systems

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Presentation transcript:

Muscular and Skeletal Systems Finz 2014

Skeletal System Function: 1. Support of the body 2. Protection of internal organs 3. Provides movement 4. Stores minerals 5. Site of blood cell formation

Structure: Axial skeleton: skull, vertebral column and ribs Structure: Axial skeleton: skull, vertebral column and ribs. Appendicular skeleton: pectoral/pelvic girdles and appendages (arms & legs Periosteum: Connective tissue layer on outside of bone. Outer Layer: "Compact bone" contains blood vessels that run through Haversian canals Core: "Spongy bone" provides strength.206 bones: red marrow (where blood is made) yellow marrow (fat cells) Cartilage: strong & flexible cushion between bones for protection.

Axial Skeleton (Green)

Appendicular Skeleton(Yellow)

Ligaments: Connects bone to bone. Tendons: Connects bone to muscle. Synovial fluid: Lubricates joints.

Joints: Where two bones meet.

Muscular System: Function: movement and protection of some internal organs. Skeletal muscles: Attached to bones for movement (Tendons) Have many nuclei Striated

Smooth muscles: Found in involuntary organs Aid in digestion & reproduction Contraction is called peristalsis One nucleus No striations

Cardiac muscle Is your heart One or two nuclei Involuntary Striated

How Muscle & Bones Interact ONLY skeletal muscles attach to bones. Attached with tendons. When a muscle contracts, it shortens. When a muscle relaxes, it lengthens. One muscle is attached to TWO bones. When the muscle contracts, it pulls the bones closer together