1. Muscular System
Lesson 2

2. How do our muscles work? TENDONS Elastic – STRETCH!
Elasticity is what moves your bones
Muscles are attached to bones via?
TENDONS

3. 2 Types Voluntary System Involuntary System
Process occurs WITHOUT KNOWLEDGE, just happens
Not under your control
Examples?
Voluntary System
Conscious
Every other muscle in your body
Jumping, move your pencil, kicking a ball
Heart- breathe, heart beat
Digestive System – the way food moves through your system

4. Muscle Movement Muscle Contracts = Muscle Relaxes =
Muscle made up of Muscle Fibers
Shortens
Lengthens

5. 3 Types of Muscle

6. Lining of body’s internal hollow organs
Smooth
Lining of body’s internal hollow organs
Mainly digestive tract
Passageway leading to the lungs
Urinary tract
INVOLUNTARY

7. Skeletal VOLUNTARY Attached to bone
majority of our muscles are skeletal
Composed of long cells called fibers
If exercised, become enlarged increase in diameter. (Not new ones)
Not exercising will cause atrophy.
VOLUNTARY

8. Cardiac INVOLUNTARY Forms wall of the heart
Responsible for why the heart contracts
Heart contracts _______________ times each day to pump blood throughout your body.
100,000
INVOLUNTARY

9. Proper warm up and stretching
Care
Exercise
Good diet – protein
Proper equipment
Proper warm up and stretching

10. Muscular Problems Bruises AKA Contusion
Muscle Soreness – usually temporary
Sore if you have not used them in awhile, or pushed beyond what they’re use to.
Bruises AKA Contusion
- blood vessels beneath the skin rupture; blow to the body

11. Muscle Problems cont.
Strain/sprain – stretched/partly torn - P.R.I.C.E
Tendonitis – injury, overuse, aging
Hernia – organ/tissue protrudes through area of weak muscle
- strain to lift heavy object

12. Muscular Dystrophy -inherited -can occur in children or adults
-skeletal muscle fibers progressively destroyed
-may occur in certain groups of muscles or all
-muscle weakness, loss of tissue

14. Muscular System