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The Muscular System 5/24/12 pgs. 155-156 Know What types of muscles are there? (There are three of them.) Evidence: you create The Muscular System “I.

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Presentation on theme: "The Muscular System 5/24/12 pgs. 155-156 Know What types of muscles are there? (There are three of them.) Evidence: you create The Muscular System “I."— Presentation transcript:

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2 The Muscular System 5/24/12 pgs

3 Know What types of muscles are there? (There are three of them.) Evidence: you create The Muscular System “I don’t know any.” is not an acceptable answer. Use complete sentences.

4 Clarifying ?s Information Muscle action -muscles that we cannot consciously control They move on their own. - muscles that we can consciously control 1. Voluntary 2. Involuntary - muscles attached to your bones – provide forces to move your joints – voluntary muscles – fast reacting (AKA striated or banded muscles) - Control movements inside your body – involuntary muscles – react slowly (non-striated) Example: digestive muscles, breathing diaphragm Muscle types Example: heartbeat, food digestion, breathing Example: smiling, chewing, walking, running The Muscular System Example: quadraceps, deltoid involuntary muscles voluntary muscles 1. skeletal muscles 2. smooth muscles

5 Clarifying ?s Information The Muscular System Example: Achilles’ tendon - Strong connective tissue that attaches muscles to bone Muscles work in pairs. One is the flexor; the other is the extensor. Ex. Bicep/tricep How skeletal muscles work - forms walls of your heart – doesn’t tire out Ex: the heart 3. cardiac tendons

6 Clarifying ?s Information Summary: The Muscular System Example: Biceps/triceps Step 1: brain sends message along the nerve fibers telling the muscle to contract. Step 2: muscle contracts. Step 3: muscle relaxes. Step 4: opposing muscle receives msg to contract & pulls relaxed muscle back to normal size. Muscle care Exercise – makes muscles grow wider and thicker – makes you stronger Stretching – makes muscles more flexible

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8 Clarifying ?s Information The Muscular System Muscle action -muscles that we cannot consciously control They move on their own. - muscles that we can consciously control 1. Voluntary 2. Involuntary - muscles that are attached to your bones – provide forces to move your joints – voluntary muscles – fast reacting (also called striated or banded muscles) - Control movements inside your body – involuntary muscles – react slowly (non-striated) Example: digestive muscles, breathing diaphragm Muscle types Example: heartbeat, food digestion, breathing Example: smiling, chewing, walking, running Example: quadraceps, deltoid, abdominus rectus involuntary muscles voluntary muscles 1. skeletal muscles 2. smooth muscles Example: Achilles’ tendon - Strong connective tissue that attaches muscles to bone - The muscle that forms the walls of your heart – does not tire out like skeletal muscles ((striated) Example: the heart 2. cardiac muscle tendons

9 Clarifying ?s Information Summary: The Muscular System Muscles work in pairs. One is the flexor; the other is the extensor. One of the pair must be in relaxation state when the other contracts or you get a Charlie horse or cramp. How skeletal muscles work Muscles can only cause movement by contracting or getting shorter and fatter. Example: Biceps in upper arm bends elbow joint; triceps on back of arm straightens elbow joint. Step 1: A message is sent from the brain along the nerve fibers instructing the muscle to contract. Step 2: The muscle contracts. Step 3: The muscle relaxes. Step 4: The opposing muscle recieves the command to contract & pulls the relaxed muscle back to normal size. Muscle care Exercise – makes muscles grow wider and thicker – makes you stronger Stretching – makes muscles more flexible

10 This PowerPoint was created from Charlene Shea’s lecture notes by Tim Paterek. It is copyrighted and may not be reproduced outside the Vancouver School District. All pictures came from Google Image Search. To fall within the Fair Use Guidelines, this PowerPoint must be used within the confines of the classroom and may not be published back onto the Internet unless the pictures are removed.


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