Transcript smooth muscles

INTRODUCTION
• THERE ARE MORE THAN 640 MUSCLES IN YOUR
BODY.
• ALMOST HALF OF THE BODY’S WEIGHT IS
MUSCLE. 40 % (CAN BE UP TO 80!)
• RESPONSIBLE FOR BODY MOVEMENT AND THE
PRODUCTION OF HEAT
• ALSO HELPS GIVE SHAPE TO YOUR BODY
TYPES OF MUSCLE
• INVOLUNTARY MUSCLES ARE NOT UNDER
YOUR CONSCIOUS CONTROL.
• YOU DO NOT HAVE TO THINK ABOUT MOVING
THEM TO MAKE THEM MOVE; THEY MOVE
ON THEIR OWN.
• RESPONSIBLE FOR ACTIVITIES SUCH AS
BREATHING AND DIGESTING FOOD.
TYPES OF MUSCLE
• MUSCLES THAT ARE UNDER YOUR CONSCIOUS
CONTROL ARE VOLUNTARY MUSCLES.
TYPES OF MUSCLE TISSUE
• THREE TYPES OF MUSCLE TISSUE
• SKELETAL, SMOOTH, AND CARDIAC
• SOME ARE VOLUNTARY AND SOME ARE
INVOLUNTARY
SKELETAL MUSCLE
• THESE MUSCLES ARE ATTACHED TO
THE SKELETON.
• PROVIDE THE FORCE THAT MOVES
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YOUR BONES.
THEY ARE RESPONSIBLE FOR
MOVEMENT.
SKELETAL MUSCLES ARE SOMETIMES
CALLED STRIATED MUSCLES BECAUSE
THE MUSCLE CELLS APPEAR BANDED,
OR STRIATED.
SKELETAL MUSCLES ARE VOLUNTARY
MUSCLES.
CAN REACT VERY QUICKLY
TIRE QUICKLY
TENDONS
• TENDONS ARE
STRONG CONNECTIVE
TISSUES THAT ATTACH
MUSCLES TO BONES.
SMOOTH MUSCLE
• SMOOTH MUSCLES ARE FOUND
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INSIDE OF MANY INTERNAL
ORGANS.
THEY ARE INVOLUNTARY
MUSCLES.
THEY WORK AUTOMATICALLY
TO CONTROL CERTAIN
MOVEMENTS INSIDE YOUR
BODY, SUCH AS THOSE USED
IN DIGESTION.
SMOOTH MUSCLES CELLS ARE
NOT STRIATED.
REACT SLOWLY
TIRE SLOWLY
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CARDIAC MUSCLE
• CARDIAC MUSCLE IS
FOUND ONLY IN THE
HEART.
• IT IS INVOLUNTARY.
• CARDIAC MUSCLE CELLS
ARE STRIATED.
• DOES NOT TIRE
• REPEATED CONTRACTIONS
ARE CALLED HEARTBEATS.
MUSCLES AT WORK
• MUSCLES DO THEIR WORK BY CONTRACTING, OR BECOMING SHORTER AND
THICKER.
• MUSCLES CONTRACT WHEN THEY RECEIVE MESSAGES FROM THE NERVOUS
SYSTEM.
• BECAUSE THEY CAN ONLY CONTRACT, NOT EXTEND, THEY MUST WORK IN
PAIRS.
• WHEN ONE MUSCLE CONTRACTS, THE OTHER MUSCLE OF THE PAIR RELAXES TO
ITS ORIGINAL LENGTH.
MUSCLES WORK IN PAIRS
MUSCULAR STRENGTH AND FLEXIBILITY
• EXERCISE MAKES INDIVIDUAL MUSCLE CELLS GROW IN SIZE.
• AS THE MUSCLE CELLS GET LARGER, THE WHOLE MUSCLE BECOMES THICKER.
• THE THICKER A MUSCLE IS, THE STRONGER IT IS.
• STRETCHING AND WARMING UP BEFORE EXERCISE MAKES THE MUSCLE MORE
FLEXIBLE.
MUSCLE INJURIES
• A MUSCLE STRAIN, OR PULLED MUSCLE, CAN OCCUR WHEN A MUSCLE IS
OVERWORKED OR OVERSTRETCHED.
• TENDONS CAN ALSO BECOME OVERWORKED OR OVERSTRETCHED.
• MUSCLE CRAMPS OCCUR WHEN THE MUSCLE CONTRACTS STRONGLY AND
STAYS CONTRACTED.
MUSCLES TO KNOW
• BICEPS
• TRICEPS
MUSCLES TO KNOW
• QUADRICEPS
MUSCLES TO KNOW
• DELTOID
MUSCLES TO KNOW
• PECTORALIS MAJOR
MUSCLES TO KNOW
• GLUTEUS MAXIMUS