Transcript Muscular System NOTES

Muscular System
Did you know? It takes 13
muscles to smile and an average
of 45 to frown!
I. Function (job) of the Muscular
System
A. Make all your daily movements possible
B. Locomotion: Providing movement for the body
1. Keep your heart beating
2. Pull your mouth into different expressions
3. Makes your digestive system work
4. Keep you breathing
5. Move the bones of your skeleton
Question
1. What are the main jobs of the muscular
system?
a.
b.
c.
2. How does the muscular system work with
the skeletal
system?_______________________
_________________________________
____
Question
1. What are the main jobs of the muscular system?
Keep your heart beating, pull your mouth into
different expressions, makes your digestive
system work, keep you breathing, and move the
bones of your skeleton.
2. How does the muscular system work with the
skeletal system?
The muscular system moves your bones. The
skeletal system provides shape and support and
enables you to move with the aid of the muscular
system.
ll. Muscular System subsystems
and the components that work together to support
the system
A. Three Types of Muscles
1. Skeletal Muscle
a.
b.
Attached to the bones of your skeleton
Provide the force that move your bones
1. Tendon- strong connective tissue that attaches
muscle to bone
c. Appear striated or banded (sometimes called striated
muscles)
d. Voluntary– you can control these muscles
e. React very quickly …..but tire quickly
2. Smooth Muscle
a. Found inside many internal organs ex. walls of
stomach and blood vessels
b. Involuntary muscle- work automatically to control
many types of movement inside your body ex.
digestion
c. Appear not striated…smooth
d. React more slowly…. Tire more slowly
3. Cardiac Muscle
a.
b.
c.
d.
Found in the heart
Involuntary muscle- work automatically
Appear striated
Do not get tired.. Contracts repeatedly 70 times
per minute every day(heartbeats)
Questions
1. List the three types of muscles and
explain what each does.
a. _________________ ________________
b. _________________ ________________
c. _________________ ________________
Questions
1. List the three types of muscles and
explain what each does.
a. Skeletal- attaches to our bones and provides
force for you to move.
b. Smooth- make up internal organs- work
automatically to control internal movements
c. Cardiac- keep heart beating
A.
How
Muscles
Work
Muscles do work by contracting
1. Become shorter and thicker
B. Contract when they receive messages from nervous system
C. Must work in pairs- because they can only contract not
extend
1. One muscle of the pair contracts the other muscle
relaxes – they always pull never push
D. Muscle can become smaller or larger
1. Muscle size is due to increase in number of muscle cells
and mostly because of individual muscle cells become
larger due to exercise
2. No exercise – muscles become flabby and become
smaller in size
Questions
1.What are the subsystems of the muscular
system? List 2 components of each.
__________________________________
__________________________________
__________________________________
2.Explain what would happen of one of the
subsystems in the muscular system
stopped working.
__________________________________
__________________________________
__________________________________