skeletal and muscle systems

8/7/2019 Skeletal and Muscle Systems

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Structure and

Movement

What you should read! Chapter

17 pages 484 - 495


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Skeletal System

What is a skeleton? Is the framework of living

bones that supports yourbody

We have 206 bones inour bodies

5 basic functions1. Provide shape and support

2. Allow for movement3. Protects organs

4. Stores nutrients

5. Produce blood cells


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Bone Structure

Bone is made of layers of living tissue

Periosteum is a thin fibrous covering

Compact Bone- hard, strong layer

Spongy Bone- found towards the ends oflong bones filled with Marrow(producesblood cells)

Blood Vessels & Nerves run throughout theinside

Go tofigure 2,page 485


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How does a bone or

muscle attach?

1. Ligaments Thick band of tissue

that hold bone together

2. Tendons Thick bands of tissue that

attach muscles to bones


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Go tofigure 3,

page 486

What is Cartilage?

Cartilage

A smooth, stiff, slippery, layer of tissue that

covers the ends of bones

Protects bones by providing cushions


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Muscular System

Muscle

An organ that can relax,

contract, and provide the

force to move your body More than 600 muscles

Two muscles groups

Voluntary muscles move

when you want them to

Involuntary musclesmove automatically

Go

tofigure 9,

page 493


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3 Types of Muscle

1. Skeletal attaches and moves

bone

Striated or bandedmuscles

Voluntary muscles

2. Smooth Involuntary muscles that

surround organs andblood vessels

3. Cardiac Muscle around the heart

Involuntary muscle

Largest

muscle

group


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kinds of Joints

1. Immoveable joint

Bones in the skull

2. Pivot Joint

Rotation of one joint on another

Example turning your head

3. Ball & socket joint

Circular motion

Example shoulder and hip

4. Hinge joint

Movement forward and backward

Example elbow and knee

5. Gliding joint

One bone glides over another

Example wrist & vertebrate

Joints the placewhere two bones meet

Holds bone in place!!

Go tofigure 4,

page 488


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Quick Quiz

1. Name 5 functions of the skeletalsystem?

2. What is the outside covering of thebone called?

3. What are the 3 types of muscle?

4. Name an involuntary muscle.

5. Name 3 joints in our body?

6. What connects muscle to bone?

I think I

remember talking

about this stuff.


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Answers

1. (1)Provide shape and support;(2)allow for movement; (3)protectsorgans; (4)stores nutrients;

(5)produce blood cells2. Periosteum

3. Skeletal, smooth, and cardiac

4. Muscles around blood vessels

5. Skull, hinge, pivot, ball & socketand gliding

6. tendons

I knew that, I

just didnt think

you wanted me

to write itdown!

skeletal and muscle systems

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