the muscular system types of muscles skeletal muscle smooth muscle cardiac muscle **muscles are...
TRANSCRIPT
The Muscular System
Types of Muscles Skeletal Muscle Smooth Muscle Cardiac Muscle
**Muscles are connected to bones by tendons
Human Body for Students: Muscular System
The Muscular System
Skeletal Muscle Attached to and moves bones Contracts/relaxes to move bone Muscle is striated (banded)
Consists of bundles of muscle fibers Voluntary Muscles
Move only when you want them to
The Muscular System Smooth Muscle
Does not have bands Involuntary
Contract without actively causing them to
Tires slowly Control breathing, blood
pressure, and digestive system
The Muscular System
Cardiac Muscle Found only in heart
Fibers make complex mesh Involuntary Does not tire
The Muscular System Actions of Skeletal Muscles
Work in pairs Flexor-muscle that bends part of the body Extensor-muscle that straightens the body
part Nerve tissue “tells” muscles to contract
or relax “Strong” contractions occur when many
muscle fibers are signaled to do so
Injuries to Muscular System
Possible Injuries Strains
Muscles or tendons are pulled beyond normal range of motion
Tendonitis Tendons are over used & become
inflamed Anabolic Steroids
Cause high bp; damage heart, liver, and kidneys; can stop bone growth
Injuries to Muscular System
Healing Injuries Limit mobility for an extended period
of time Apply ice (reduce swelling) then heat
(relax and loosen muscles) Apply electric current to stimulate
healing process Shorten or replace ligaments/tendons
Injuries to Muscular System Exercise to Reduce Risk
Strengthen skeletal muscles by Resistance Exercise (bench press, pull ups)
Aerobic Exercise Strengthen heart and increase
endurance Jogging, cycling, swimming
How Muscles & Bones Work Together
How Your Body Works: Bone and Muscle
How We Control Bones and Muscles