8 th grade Health Unit Muscles and Skeletal

8 th grade Health Unit Muscles and Skeletal Systems

Bell Ringer Pick up and complete the Saved by the skeleton worksheet. Front and back

• Skeletal system- an internal system made up of bones, joints, and connective tissue • There are 206 bones in the body. • What the skeletal system does for you: • Supports your body • Allows movement • Protects soft tissue • Forms blood cells

Connective tissue: • Cartilage- strong, flexible tissue that cushions joints ex. knee

Ligaments-connect bones to bones ex. Acl Tendon-connect muscle to bones ex. Achilles

How muscles Work • Extension- the • Two basic lengthening of actions muscle fibers account for all and contractionmuscle is the shortening movement. of muscle fibers.

Cranium Humerus Scapula Radius Ulna Mandible Clavicle Ribs Vertebrae Pelvis Phalanges Femur Petella ----- Fibula Tibia Phalanges

Muscular System • The body is composed of over 600 muscles • Muscular System-group of tough tissue that makes your body parts move

• 3 Kinds of Muscle: • A. Skeletal-attached to bones that enable you to move (voluntary)

• B. Smooth- the muscles found in the organs, blood vessels, and glands (involuntary) • • C. Cardiac- found only in the walls of the heart (involuntary)

Voluntary and Involuntary • Voluntary Contraction • Involuntary Contraction • Striated muscle that can • You cannot control the be controlled movement. You breathe voluntarily. . meaning on your own and your you control the muscles heart beats on its own. that you want to move. . . Another would be a arms legs fingers. . . ect myospasm meaning a muscle spasm.

Your Muscular System • What is a tendonitis? Sometimes the tendons become inflamed for a variety of reasons, and the action of pulling the muscle becomes irritating. • What is a sprain? Wrench or twist the ligaments of (an ankle, wrist, or other joint) violently • What is a cramp? A painful, involuntary muscle contraction, typically caused by fatigue or strain • What is a spasm? A sudden involuntary muscular contraction or convulsive movement. – A sudden and brief spell of an activity or sensation: "a spasm of coughing What is a hernia? A condition in which part of an organ is displaced and protrudes through the wall of the cavity containing it • What is a dislocation? Injury or disability caused when the normal position of a joint or other part of the body is disturbed

Pectoral Deltoid Biceps Rectus abdominus brachioradialis Quadriceps Sartorius Tibialis

Deltiod Triceps Trapizus Latissimus dorsi Gluteus maximus Hamstring Gastrocnemius Soleus (side of claf muscle)

VIDEO • http: //10. 197. 3. 241/SAFARI/montage/play. ph p? keyindex=36251&location=005849 • Safari Montage- Bones and Muscles- 22 min.