SKELETAL &

MUSCULAR

SYSTEMS

In this lesson, you will be able to

discuss the functions of the skeletal and muscular systems.

recognize how bones and muscles work together.

describe how to keep your bones and muscles healthy.

Exploring the Skeletal & Muscular System

Chapter 3

Lesson 2

What kind of jobs do bones do?

Job is to support and help move body

Protect organsMake blood cellsStores minerals

What is the skeletal system made up of?

bones & connectors tendons, ligaments, &

cartilage

How many bones does an adult have?

206

Do you think you were born with more or less than 206 bones?

More …. Babies are born with 350 soft bones that is mostly cartilage

Is bone tissue alive?

Yes

What is bone tissue made up of?

Cells

What happens if your diet does not include enough minerals like calcium & phosphorus?

Your body will take them from your bones and give them to your muscles and nerves

* Bones will get weaker

True or False: Bone cells are always being destroyed and remade?

True

About how many muscles do you have?

More than 600

What is the job of the muscular system?

The muscular system provides power and flexibility you need to move.

SKELETAL

SYSTEM

In this lesson, you will be able to

discuss the functions of the skeletal and muscular systems.

recognize how bones and muscles work together.

describe how to keep your bones and muscles healthy.

Exploring the Skeletal & Muscular System

Chapter 3

Lesson 2

What is inside a bone?

bone.html.url

Skeletal System

a framework of bones and other tissues that support the body. Includes the tissues that connect to

those bones Helps you moveProtects internal organsStores calcium and other mineralsMakes blood cells

Joints

Joints - places where two or more bones meet

Some joints allow bones to move

Other joints never move but protect organs instead

A Dislocation is when the bone is moved out of place

Because the bone is moved out of place the joint can no longer

function

Figure 3.4

page 67

The Skeletal System

Connecting Tissues

Connecting Tissues allow bones and muscles to work together as they move

join bones to musclesholds bones to other bones at the jointcushions bones and allows joints to move

easily

Connecting Tissues

3 Types of Connection Tissues

TendonsLigamentsCartilage

Tendons

Tendons – types of connecting tissues that joins muscle to bone and muscle to muscle

When muscle contracts tendon pulls on bones to move body

A strain is a stretching or tearing of a muscle or tendon

Strains are injuries to soft tissue between the jointsmuscles & tendons

Ligaments

Ligaments - type of connecting tissue that holds bones to other bones at the joints

connects bone to bone

Sprains occur when a ligament is torn, stretched or moved in a direction it is not supposed to go.

Injuries to joints are usually sprainsThe area swells to protect it while it is healing

makes it possible

for knees & ankles

to work

Cartilage

Cartilage - strong, flexible tissue that allows joints to move easily, cushions bones, and supports soft tissue. covers the ends of the bones & provides a smooth

surface that allows joints to move easily

cushions individual bones spine … cartilage cushions individual bones vertebrae

supports certain structures nose & ears

Connecting Tissues

spine … cartilage cushions individual

bones vertebrae

http--kidshealth.org-misc-movie-bodybasics-bodybasics_knee.html.url

Video Clip

MUSCULAR

SYSTEM

MovieSource The Muscular System.url

Muscular System

Tissues that move parts of the body and control the organs

Provides the power & flexibility you need to move

Muscular System

Three main types of muscles Skeletal

are voluntary …. You can control them works in pairs …. To pull bones to move them

Figure 3.6 page 69 bicep & triceps

Smooth are involuntary … moves without you consciously

controlling them body organs and blood vessels contain smooth muscles

Cardiac The heart is its own special involuntary muscle called the

cardiac muscle

Figure 3.5

page 68

The Muscular

System

Tips for Caring for Your Bones and Muscles

Do flexibility exercises.

Choose physical activities that strengthen your muscles and bones.

Choose physical activities that build cardiovascular strength.

Practice proper posture.

When you lift heavy objects, keep your back straight and bend your knees.

Eat healthful foods to provide bones and muscles the nutrients they need.

Fitnessgram test that measures this area

Fitnessgram test that measures this area

Fitnessgram test that measures this area