Muscular System

1
Muscular System

• Body System
• Mrs. Pogue
• Health 1000

2
What Muscles Do

• The muscular system allows for voluntary and
  involuntary movements.

• Your muscular system allows you to move.

3
How Muscles Work

• When bundles of muscles are stimulated by nerve
  impulses, or signals, they contract, or shorten.
• When they relax, the bundles extend, or stretch.

4
Types of Muscles
Three Types of Muscle Tissue
Smooth Muscle
Skeletal Muscle
Cardiac Muscle
5
What Muscles Do

• Involuntary muscle movements help you breathe,
  make your heart beat, and move food through your
  digestive system.

6
Types of Muscles

• Smooth muscles are involuntary muscles.

Smooth muscles
Muscles that act on the lining of the bodys
passageways and hollow internal organs
7
Types of Muscles

• Cardiac muscle is involuntary and is responsible
  for the contraction of your heart. Your heart
  beats 100,000 times each day.

Cardiac muscle
A type of striated muscle that forms the wall of
the heart
8
Types of Muscles

• Most of your muscle tissue is skeletal, and
  almost all skeletal muscles are under voluntary
  control.

Skeletal muscles
Muscles attached to bone that cause body
movements
9
What Muscles Do

• Skeletal muscles work in pairs to produce
  movement.

10
Caring for Your Muscles
Get regular exercise.
Eat high protein foods to build muscle.
Practice good posture to strengthen back muscles.
Use proper equipment and wear appropriate
clothing to protect muscles during any physical
activity.
Warm up properly and stretch before exercising,
and cool down after exercising to prevent injury.
11
Understanding Muscular Problems

• Bruises are areas of discolored skin that appear
  after an injury that causes the blood vessels
  beneath the skin to rupture and leak.
•  
• Large bruises can be treated with an ice pack to
  reduce initial swelling.

12
Understanding Muscular Problems

• Muscle strains or sprains result when muscles are
  stretched or partially torn from overexertion.
• Apply ice to strains to reduce swelling, and rest
  the affected area.

13
Understanding Muscular Problems

• Tendinitis can be caused by injury, overuse, or
  natural aging.

Tendinitis
The inflammation of a tendon
14
Understanding Muscular Problems

• Hernias commonly occur in the abdomen from
  straining to lift a heavy object. Surgery can
  usually repair hernias.

Hernia
An organ or tissue protrudes through an area of
weak muscle
15
Understanding Muscular Problems

• Muscular dystrophy is an inherited disorder in
  which skeletal muscle fibers are progressively
  destroyed.
• There is no cure, but with early detection,
  muscle weakness can be delayed through exercise
  programs.

16
Sources

• http//graphics8.nytimes.com/images/2007/08/01/hea
  lth/adam/19917.jpg
• http//www.sport-fitness-advisor.com/images/muscle
  _anatomy.jpg
• http//images.encarta.msn.com/xrefmedia/sharemed/t
  argets/images/pho/t790/T790539A.jpg
• http//clcpages.clcillinois.edu/home/bio567/pages/
  newtissues/Skeletal20muscle2003a.jpg
• http//www.sciencelearn.org.nz/var/sciencelearn/st
  orage/images/contexts/see_through_body/sci_media/c
  ardiac_muscle/8558-1-eng-NZ/cardiac_muscle_full_si
  ze_landscape.jpg