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 organs Make blood cells Stores 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?

Skeletal System a framework of bones and other tissues that support the body. Includes the tissues that connect to those bones Helps you move Protects internal organs Stores calcium and other minerals Makes 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 muscles holds bones to other bones at the joint cushions bones and allows joints to move easily

Connecting Tissues 3 Types of Connection Tissues Tendons Ligaments Cartilage

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 joints muscles & 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 sprains The 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

Video Clip

MUSCULAR SYSTEM

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