What to think about….

What are the functions of muscles?

How do muscles work? What are some of the different

types of muscles? What happens to muscles based

upon their amount of use?

Muscles and bones are joined or attached by tissue called

It is the tendons that allow muscles to move the bones.

About how much of your body weight is muscle?

This weight consists of the over muscles contained in the human body.

Skeletal MuscleSkeletal Muscle Called skeletal muscle

because it attaches to the skeleton and makes it move. These are strong muscles. MUSCLES, SUPERFICIAL LAYER, ANTERIOR VIEW

Mandible

Face

Cranium

Deltoideus

Pectoralis major

Serratus anterior

Obliquus externus abdominis

(with an indication of the Aponeurosis

which extends from this muscle

to cover the Rectus abdominis)

Rectus abdominis

Tensor fasciae

latae

Sartorius

Rector femoris

mediusGlutaeus

Vastus lateralis

Vastus medialis

Adductor longus

Pectineus

Brachioradialis

Extensor carpi radialis longus

Biceps brachii

Pronator teres

Flexor carpi radialis

Gracilis

Sternocleidomastoideus

Brachialis

Flexor digitorum sublimis

Abductor Pollicis longus

Extensor pollicis brevis

Extensor digitorum communis

Extensor carpi radialis brevis

Coracobrachialis

Tibialis anterior

Extensor digitorum longus &

peronaeus tertius

Clavicle

Scapula

Radius

UlnaSacrum

Patella

Fibula

Tibia

Pelvis

Trapezius

Soleus

Gastrocnemius

Triceps brachii

Biceps femoris

Latissimus dorsi

Peronaeus longus

These are voluntary muscles.Another name for skeletal muscle is striated muscle.

Cardiac MuscleCardiac Muscle

This is a kind of strong muscle out of which the heart is made.

Cardiac muscle can work continuously for a long period of time without getting tired.

Cardiac muscle is involuntary.

Smooth MuscleSmooth Muscle

These are muscles that line places like the digestive tract.

These weak muscles contract and relax to create peristalsis.

They are also involuntary.

Controlled vs. Automatic

-Muscles that you can control.

-Muscles that you can’t control.

How do muscles work?

Muscles work by and .

Skeletal muscles make us move. However, muscles are only capable of one type of force.

Since muscles can only pull and not push, how does this effect the way they work in the body?

The muscles have to work in pairs. One muscle of a pair bends a joint, while the other straightens it back out.

BicepTricep

•When the bicep contracts and the triceps relaxes, the arm bends.

•When the Tricep contracts and the bicep relaxes the arm straightens.

When you don’t use your muscles they become and

.

Unused muscle cells actually become smaller if not used regularly.

But, if used regularly, they become larger and stronger.

Of course, the most important muscle in the body is the

How does a strong heart benefit you?

It works more efficiently. This will give you more energy and help you live longer.

1. Which of the following is not a kind of muscle?

A. Striated B. TendonC. CardiacD. Smooth

2. What attaches muscles to the bones?

A. StriationsB. TendonsC. DiaphragmsD. Cardiacs

3. Which muscles are responsible for peristalsis?

A. TendonsB. SkeletalC. CardiacD. Smooth

4. Which muscles are responsible for your ability to move around?

A. TendonB. SmoothC. CardiacD. Skeletal

5. The stomach is surround by which type of muscle?

A. StriatedB. CardiacC. SmoothD. Tendon

6. Which of these is cardiac muscle associated?

A. HeartB. SkeletonC. TendonsD. Digestive System

7. What happens to muscles that get used regularly?

A. Get flabbyB. Grow largerC. Become weakerD. All of the above

8. What kind of muscle is the heart?

A. InvoluntaryB. VoluntaryC. SkeletalD. Smooth

REFRENCE

Reference from IC.WNLSD.CA