1. MUSCLES
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2. The human body
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3. About how many muscles do you think the human body has?
Answer = 650
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4. How many muscles do you think are in our face and neck?
Our face and neck contain about one-fourth of the muscles in our body.
That is about 125+ muscles.
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5. Smile or Frown?
A never-ending debate…but research suggests the following numbers:
It takes 17 muscles to smile and 43 muscles to frown, OR..
It takes 26 muscles to smile and 62 muscles to frown
                  
            
What conclusion can we make from these 2 statements?
- That people smile & frown differently… but you should still be POSITIVE! ;)
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6. Muscles… Muscles have three important functions:
i) to produce movement (through contraction)
ii) maintain posture (maintain muscle tone against force of gravity)
ii) generate heat (byproduct of muscle contraction, *NB for temperature regulation)
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8. What are muscles made of?
Muscles are made of hundreds of tiny fibers.
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9. What do muscles need to function?
Oxygen (helps w the conversion of ‘nutrients’ into energy (ATP *see below)… insufficient O2 = cramps
ATP (energy ‘molecule’ of the body)
Glucose (broken down to produce ATP)
Amino Acids (=protein – muscle growth/development)
Vitamin D (promotes muscle growth, especially after injury)
Zinc (regulates protein function)
*This all gets there through the blood which perfuses the muscles fibres at capillaries
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10. Yes - Muscles make up about half of your body weight.
Are muscles dense?
Yes - Muscles make up about half of your body weight.
Think of this then from a weight training/fitness perspective – as you workout, build muscle and get more fit, you will actually weigh MORE
(that’s why it’s important to not fixate on the #).
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11. How do muscles move our bones?
Do muscles pull or push our bones?
Muscles pull in order to make our bones move.
Our muscles usually work in pairs (antagonist muscle pairs).
One muscle contracts (pulls) while the opposite muscle relaxes (extends)
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12. When your arm is straight:
Your bicep is relaxed
Your Tricep is contracted
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13. Your bicep is contracted
When you arm is bent:
Your bicep is contracted
Your tricep is relaxed
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14. There are three different types of muscle in our body.
3 Types of muscles
There are three different types of muscle in our body.
Skeletal muscles
Smooth muscles
Cardiac muscles
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15. Skeletal muscles Are voluntary muscles that move bones.
Are called striated because they look striped (dark & light bands = sarcomeres)
Are attached to tendons, which are attached to bones.
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16. Skeletal Muscle
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17. Tendons
Tendons are tough cords (fibrous collagen tissue) that attach muscles to bones.
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18. To digest food, pump blood,vomit, control bladder, and give birth
Smooth Muscles
Are involuntary muscles that make up the blood vessels, stomach, intestines, and other groups
We can not control our smooth muscles
What are some example of when our smooth muscles are used?
To digest food, pump blood,vomit, control bladder, and give birth
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19. Smooth Muscle
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20. Cardiac Muscle
A special kind of involuntary, striated (striped) muscle that makes up the heart.
The muscles in the heart contract in order to pump the blood through your body.
If your muscle stops pumping the blood, you have a heart attack (‘cardiac arrest’)
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21. Cardiac Muscle
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22. 3 types of muscle
Smoot Cardiac Skeletal
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23. How many times does your heart beat in a day?
The cardiac muscles in your heart cause it to beat between 70 and 80 times per minute.
So in a 24-hr period, this is 115,200 beats!!
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24. What happens when we do not use our muscles?
Our muscles get smaller, which makes them weak = ATROPHY (opposite of HYPERTROPHY)
Can you think of some examples of when this may happen?
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25. That’s why it’s so important for us to keep MOVING (bone & joint health), EXERCISE regularly (maintain/develop muscles) and EAT NUTRITIOUS foods (provide healthy & adequate fuel)
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