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The Muscular System

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by

Mr MacDonald (PE)

on 18 June 2013

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Transcript of The Muscular System

The Muscular System
Topic 1.2.4: A healthy, active lifestyle and your muscular system
Lesson Objectives

All
:
Will be able to understand what
voluntary
and
involuntary
types of muscles are.

How muscles
allow movement
and be able to
name the key muscles.

Most:

As above. + Be able to
locate muscles on a body.


Understand what
antagonistic muscle pairs

are and be able to name the
main pairs
.

Some:

As above. + know two different types of
muscle fibres
and
contractions that take place.


Be able to give
sporting examples
of each of the
fibres
.


There are approximately 642 muscles in the human body... you only need to know
11
of them.

Write the muscles out in order starting from top to bottom.
Close your books..
Working with a
partner
, one person act as a body and the other use sticky notes to
label the 11 muscle locations
on them. (You have 4 Mins)
What are the two muscles working when you
flex and extend
your arm?

Extension: In your books explain in your own words how are they
working together
to create this movement?
An
Antagonistic Pair
is when one muscle
contracts (Concentrically)
and the other
relaxes (Eccentrically)
to allow a joint to function and move.

Extension: Can you think of any other
Antagonistic muscle
pairs?
What is the
common
theme about each of these pairs - Think about where the muscles are in relation to each other?
An
_______________ pair
of muscles create m___m__t when one (the
Prime Mover -
Bicep) C__________ and the other (the
Antagonist
- ie. T______) Relaxes.
Muscles
contract
when they '
work
'.

When a muscle contracts to create a particular movement,
it's called an
isotonic
contraction.

When a
muscle shortens
it is called a
concentric
muscle contraction.
When a
muscle lengthens
it is called an
eccentric
muscle contraction.

How do muscles make us move?
Muscles can be split into two groups :

Voluntary
&
Involuntary

Involuntary muscles
work our internal organs (stomach, intestine and bladder ). They are outside of our control.
Voluntary muscles
make the body move. They are attached to the skeleton and can be controlled.
Voluntary muscles have
fast twitch
and
slow twitch
fibres.

Fast twitch fibres
contract quickly
, but do
not use oxygen well and tire quickly.

Slow twitch fibres
contract slowly,
but
use oxygen well and keep going for a long time.


Extension:

1. Using the above statements - What two
different types of runners
would benefit from having either of these these muscle fibres? (2 Marks)
Any guesses?...
A muscle that contracts but does not move is called an
isometric
contraction.
Copy and fill in -
The are two different types of muscle fibres
Exam Answers
Answers:
1. Isometric
2. Quadriceps / Hamstrings/ Gastrocnemius
3. Fast Twitch
4. Does not use oxygen well / Quick to tire
5. Quadriceps / Hamstrings
6. Voluntary
7. C
8. (Click to next slide)



Iso
TONIC
- moves like Water
CON
centric - Shortens (
Con
tract)
E
ccentric - Lengthens (
E
lastic)
Easy ways to remember
Iso
METRIC
- Does not move
Antagonistic Pairs:

2. Think of 3 sports that rely heavily on
Fast Twitch Fibres
?
3. Think of 3 sports that rely heavily on
Slow Twitch Fibres
?
In pairs write down
Fill out the exam paper then swap with the person next to you.
Starter: Name as many muscles on the human body as you can. (2 Mins)
1 -3 - Poor
3 - 6 - Average
6 - 9 - Good
11 + - Excellent
Homework:

Choose an
antagonistic muscle pair
and
create a poster
to explain clearly
how it works
.

Label fully with muscle names an the muscle actions involved ie. Concentric/eccentric
Background:
The term 'Muscular system' describes all the muscles in your body and how they work.

Muscles are used for a variety of different things some of these included:
Movement
Protection
Body Shape
Maintaining Posture
Full transcript