Presentation is loading. Please wait.

Presentation is loading. Please wait.

The Musculo-Skeletal System. Why Both? This system includes both skeletal and muscular systems because they need each other to function properly This.

Similar presentations


Presentation on theme: "The Musculo-Skeletal System. Why Both? This system includes both skeletal and muscular systems because they need each other to function properly This."— Presentation transcript:

1 The Musculo-Skeletal System

2 Why Both? This system includes both skeletal and muscular systems because they need each other to function properly This system includes both skeletal and muscular systems because they need each other to function properly

3 The Skeletal System The skeleton is important because: The skeleton is important because: 1. It supports our body 2. It stores minerals 3. It allows us to move 4. It protects our internal organs 5. It makes blood cells

4 What are bones? Bones are living tissue Bones are living tissue Inside bones is a soft tissue called marrow Inside bones is a soft tissue called marrow New blood cells made by the marrow inside New blood cells made by the marrow inside Contain nerve endings (sense pain) Contain nerve endings (sense pain) Lightweight and strong Lightweight and strong

5 Types of Bones There are two types of bones: compact and spongy There are two types of bones: compact and spongy Compact Bone: hard outer layer of bones hard outer layer of bones gives bones their smooth, white, and solid appearance gives bones their smooth, white, and solid appearance accounts for 80% of the total bone mass of an adult skeleton. accounts for 80% of the total bone mass of an adult skeleton.

6 Types of Bone Spongy Bone Spongy Bone Made up of compounds that make the bone lightweight Made up of compounds that make the bone lightweight Allows room for blood vessels and marrow Allows room for blood vessels and marrow

7

8 Groups of Bones Bones are divided into groups Bones are divided into groups Flat Flat Long Long Short Short Irregular Irregular

9 Groups of Bones Flat Flat The purpose of flat bones is to protect important organs and to provide a flat surface muscle attachment. The purpose of flat bones is to protect important organs and to provide a flat surface muscle attachment. Include: the cranium (skull), scapula (shoulder blade), sternum (breast bone), pelvis, ribs and hip bone Include: the cranium (skull), scapula (shoulder blade), sternum (breast bone), pelvis, ribs and hip bone

10 Types of Bones Long Long The bone is longer than it is wide (that’s how it is classified) The bone is longer than it is wide (that’s how it is classified) Growth plates at the end that are covered with cartilage Growth plates at the end that are covered with cartilage Include: femur, tibia Include: femur, tibia and humerus

11 Types of Bones Short Short Bones that are as wide as they are long Bones that are as wide as they are long Provide stability and support Provide stability and support Do not move a lot Do not move a lot Carpals and Tarsals (bones in wrists and feet) Carpals and Tarsals (bones in wrists and feet)

12 Types of Bones Irregular Irregular Have their own category because they do not have distinct shape Have their own category because they do not have distinct shape Include bones in your jaw and vertebrae (backbone) Include bones in your jaw and vertebrae (backbone)

13 Cartilage Tough and flexible Tough and flexible Found in the nose, outer ear and joints Found in the nose, outer ear and joints Prevents cushioning and stops bones from rubbing together Prevents cushioning and stops bones from rubbing together Minerals added to cartilage makes bone Minerals added to cartilage makes bone

14 Tendons A tough band connective tissue that connects muscle to bone A tough band connective tissue that connects muscle to bone Can only exert a pulling force Can only exert a pulling force When a muscle moves, the tendon pulls and moves the bone When a muscle moves, the tendon pulls and moves the bone

15 Ligaments Tissue that connects bones to other bones to form a joint (like elastic bands) Tissue that connects bones to other bones to form a joint (like elastic bands) Prevents bones from moving at a joint and are important in preventing dislocation Prevents bones from moving at a joint and are important in preventing dislocation

16

17 Joints Are the points of our skeleton where two bones meet Are the points of our skeleton where two bones meet Every joint contains cartilage, tendons and ligaments Every joint contains cartilage, tendons and ligaments Cartilage coats the ends of the bones Cartilage coats the ends of the bones Ligaments attaches two bones together Ligaments attaches two bones together Tendons attach muscles to the bones Tendons attach muscles to the bones

18 Types of Joints There are 3 types of joints There are 3 types of joints Fixed – does not allow movement Fixed – does not allow movement Partially Movable – allows a little movement Partially Movable – allows a little movement Movable – allows complete movement Movable – allows complete movement

19 Partially Movable Joints Allows a very little movement by the bones Allows a very little movement by the bones Ex. The joints between our vertebrae Ex. The joints between our vertebrae

20 Fixed Joints The bones are tightly locked together so no movement occurs The bones are tightly locked together so no movement occurs Ex. Joints found in the skull Ex. Joints found in the skull

21 Movable Joints Ball and Socket – allows movement in almost all directions. Ball and Socket – allows movement in almost all directions. One rounded end of the bone fits into the socket end of another bone One rounded end of the bone fits into the socket end of another bone Ex. Hips and shoulders Ex. Hips and shoulders ml ml

22 Movable Joints Hinge Joint – allows movement in only one direction like a door Hinge Joint – allows movement in only one direction like a door Ex. Elbows, knees fingers and toes Ex. Elbows, knees fingers and toes Pivot Joint – allows movement from side to side Pivot Joint – allows movement from side to side A bone rests and rotates on one spot back and forth A bone rests and rotates on one spot back and forth Ex. Neck, elbow and knees (also hinge joints) Ex. Neck, elbow and knees (also hinge joints)

23 Movable Joints Gliding Joint – where several bones come together like a puzzle and can slide past one another Gliding Joint – where several bones come together like a puzzle and can slide past one another Ex. Wrists and ankles Ex. Wrists and ankles ml ml


Download ppt "The Musculo-Skeletal System. Why Both? This system includes both skeletal and muscular systems because they need each other to function properly This."

Similar presentations


Ads by Google