Embed Size (px)
Citation preview
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
