The Muscular System.

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Presentation transcript:

The Muscular System

What do muscles do? 1. allows movement 2. enables voluntary and involuntary movement a. voluntary – movements you can control ex. Shooting a basketball, playing piano, etc. b. involuntary – occurs without you knowing it ex. Muscles that help you breathe, make your heartbeat

3 Types of Muscle

3 Types of Muscle 1. Smooth Muscle – acts on the lining of the body’s passageways and hollow internal organs - found inside digestive tract, lining of blood vessels INVOLUNTARY – you cannot control the movement!

Smooth Muscle Blood Vessel ----

Types of Muscles 2. Skeletal Muscle – muscles attached to bone that cause body movements. VOLUNTARY control!

Types of Muscles Skeletal muscles often work together to perform contrasting movements - Flexor – muscle that closes a joint - Extensor – muscle that opens a joint a great example is when you bend and straighten your arm at the elbow using your biceps and triceps.

Types of Muscles 3. Cardiac Muscle – muscle that forms the walls of the heart - responsible for the contraction of your heart - INVOLUNTARY!

Properties of Muscles 1. Contractibility – muscles have the ability to shorten, or contract 2. Extensibility – muscles lengthen

How do you build strong muscles? a. Exercise regularly! b. Eat foods that are high in protein Protein – building blocks of muscle - meats, milk, eggs, yogurt, fish, nuts c. exercise the right way, use the weight room correctly

Extra Credit: HOME WORKOUT! Muscle(s) Worked – My Guess Actual Muscle Worked - Primary Actual Muscle Worked - Secondary 1. Chair Dips 2. Push ups 3. Lunges 4. Calf Raise 5. Crunches 6. Mule Kick

Muscle Diagram

Problems of Muscular System 1. Muscle Strain a. painful stretching or tearing of muscle fibers caused by overexertion b. to heal, ice for the first 24 hours, then apply heat to the strain

Problems of Muscular System 2. Muscle Cramp a. when a muscle contracts spasmodically and involuntarily b. may occur from using a muscle for too long c. to heal - gently stretch muscle and massage the knot

Problems of Muscular System 3. Muscular Dystrophy a. crippling disease characterized by progressive wasting away of skeletal muscles b. muscle cells are unable to function properly c. symptoms – muscle weakness, difficulty standing/walking, frequent falling d. cannot be cured, but early detection is key as muscle weakening can be delayed

Muscular Dystrophy

Bell Ringer #3 Label the muscular system diagram on the last page of your note packet! On your bell ringer sheet, pick the muscle or muscles you need