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BELL WORK. Write about a time you broke a bone or sprained your ankle. . BODY SYSTEMS. SKELETAL SYSTEM. OBJECTIVES. explain the functions of the skeletal system. identify four types of joints. list some problems of the skeletal system.

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BELL WORK

Write about a time you broke a bone or sprained your ankle.


Body systems
BODY SYSTEMS

SKELETAL SYSTEM


Objectives
OBJECTIVES

  • explainthe functions of the skeletal system.

  • identifyfour types of joints.

  • listsome problems of the skeletal system.

  • practicehealthful behaviors to keep your skeletal system healthy.


Bone facts
BONE FACTS

  • You have 206 total bones in your body.

  • When you were born you had over 300 bones. As you grew, some of these bones began to fuse together and now you have 206 bones.

  • The human hand has 27 bones

  • The longest bone in your body?

    Your thigh bone, the femur -- it's about 1/4 of your height.

    The smallest is the stirrup bone in the ear which can measure 1/10 of an inch.


Body s framwork
BODY’S FRAMWORK

The skeletal system helps you stand up and works with your muscles to help you walk, run, jump, bend, lift, and carry.

skeletal system A body system made up of bones, joints, and connective tissue


Body s framework
BODY’S FRAMEWORK

The skeletal system includes many bones that support the body and protect the organs.


Body s framework1
BODY’S FRAMEWORK

The backbone, or spinal column, consists of 24 separate bones called vertebrae.


Functions
FUNCTIONS

The skeletal system provides a strong, stable framework capable of movement


Functions1
FUNCTIONS

The skeletal system supports and protects delicate internal organs.


Functions2
FUNCTIONS

Bones store important minerals such as calcium and phosphorus.


Functions3
FUNCTIONS

Bones produce the body’s blood cells.

Little Red Riding Cell

Her job is to carry oxygen to ALL OF THE CELLS IN THE BODY!


Marrow
MARROW

Red bone marrow makes millions of blood cells each day.

marrow Soft tissue in the center of some bones


Joints
JOINTS

joint The point at which two bones meet


Joints1
JOINTS

Some joints do not move. Others move only slightly, and others allow a wide range of movement.


Joints2
JOINTS

HING JOINTS

These joints allow movement in one direction. Knees and elbows are hinge joints.


Joints3
JOINTS

GLINDING JOINGS

Gliding joints help bones slide over one another without twisting. Examples include wrist and ankle joints, and connective bones below the neck in the collarbone.


Joints4
JOINTS

PIVOT JOINTS

These joints allow movement with limited rotation. A pivot joint is found between the neck and the head.


Joints5
JOINTS

BALL AND SOCKET JOINTS

These joints allow complete rotations, making it possible for bones to move in all directions. Your hips and shoulders are examples of ball-and-socket joints.


Connective tissue
CONNECTIVE TISSUE

cartilage A strong flexible, gel-like tissue that cushions your joints


Cartilage
CARTILAGE

At joints where movement occurs, the bone surfaces are coated with smooth, slippery cartilage.


Connective tissue1
CONNECTIVE TISSUE

tendons Tough bands of tissue that attach your muscles to bones


Tendon
TENDON

A large tendon that you can easily feel is your Achilles tendon.


Connective tissue2
CONNECTIVE TISSUE

ligaments Cord-like tissues that connect the bones in each joint


Ligaments
LIGAMENTS

Ligaments help hold bones in place.


Problems with the skeletal system
PROBLEMS WITH THE SKELETAL SYSTEM

FRACTURE

A break in the bone caused by an injury


Problems with the skeletal system1
PROBLEMS WITH THE SKELETAL SYSTEM

DISLOCATION

When a bone is pushed out of its joint


Problems with the skeletal system2
PROBLEMS WITH THE SKELETAL SYSTEM

SPRAIN

Stretching or twisting of ligaments in a joint


Problems with the skeletal system3
PROBLEMS WITH THE SKELETAL SYSTEM

OVERUSE INJURY

An injury that happens over time, especially in sports


Problems with the skeletal system4
PROBLEMS WITH THE SKELETAL SYSTEM

SCOLIOSIS

A disorder in which the spine curves to one side of the body


Problems with the skeletal system5
PROBLEMS WITH THE SKELETAL SYSTEM

OSTEOPOROSIS

A condition characterized by brittle and porous bones


Caring for your skeletal system
CARING FOR YOUR SKELETAL SYSTEM

NUTRITION

EXERCISE

POSTURE

PROPER PROTECTION


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