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36–1 The Skeletal System A. The Skeleton B. Structure of Bones C. Development of Bones D. Types of Joints 1. I PowerPoint Presentation
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36–1 The Skeletal System A. The Skeleton B. Structure of Bones C. Development of Bones D. Types of Joints 1. I

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36–1 The Skeletal System A. The Skeleton B. Structure of Bones C. Development of Bones D. Types of Joints 1. I - PowerPoint PPT Presentation


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Section Outline. Section 36-1. 36–1 The Skeletal System A. The Skeleton B. Structure of Bones C. Development of Bones D. Types of Joints 1. Immovable Joints 2. Slightly Movable Joints 3. Freely Movable Joints E. Structure of Joints F. Skeletal System Disorders.

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Presentation Transcript
slide1

Section Outline

Section 36-1

  • 36–1 The Skeletal System
    • A. The Skeleton
    • B. Structure of Bones
    • C. Development of Bones
    • D. Types of Joints
      • 1. Immovable Joints
      • 2. Slightly Movable Joints
      • 3. Freely Movable Joints
    • E. Structure of Joints
    • F. Skeletal System Disorders
slide2

A. The Skeleton

  • The skeleton supports the body, protects internal organs, provides for movement, stores mineral reserves, and provides a site for blood cell formation
  • Bones provide a system of levers on which muscles act to produce movement
  • There are 206 bones in the adult human skeleton
  • Divided into two parts – Axial Skeleton (central axis of body) and appendicular skeleton (appendages)
slide3

Skull

Clavicle

Sternum

Scapula

Humerus

Ribs

Radius

Vertebral column

Pelvis

Ulna

Carpals

Metacarpals

Phalanges

Femur

Patella

Fibula

Tibia

Tarsals

Metatarsals

Phalanges

The Skeletal System

Section 36-1

Axial Skeleton

Appendicular Skeleton

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B. Structure of Bones

  • Bones are a solid network of living cells and protein fibers that are surrounded by deposits of calcium salts
  • Periosteum – tough layer of connective tissue surrounding the bone
  • Haversian canals – carry blood vessels and nerves
  • Bonemarrow – cavities within the bone that contain soft tissue. Also where cells are made
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Spongy bone

Haversian canal

Compact bone

Compact bone

Periosteum

Bone marrow

Spongy bone

Osteocyte

Artery

Periosteum

Vein

Figure 36-3 The Structure of Bone

Section 36-1

slide6

hyaline cartilage

elastic cartilage

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D. Types of Joints

  • Joint – a place where one bone attaches to another bone
  • Depending on its type of movement a joint is classified as immovable, slightly movable, or freely movable
  • 1. Immovable Joints
  • a.k.a. – fixed joints – no movement
  • 2. Slightly Movable Joints
  • -small amount of restricted movement
slide10

Clavicle

Humerus

Ball-and-socket joint

Radius

Pivot joint

Scapula

Ulna

Humerus

Femur

Patella

Fibula

Metacarpals

Hinge joint

Carpals

Saddle joint

Tibia

Figure 36-4 Freely Movable Joints and Their Movements

Section 36-1

Ball-and-Socket Joint

Pivot Joint

Hinge Joint

Saddle Joint

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Muscle

Tendon

Femur

Patella

Bursa

Ligament

Synovial fluid

Cartilage

Fat

Fibula

Tibia

  • E. Structure of Joints
  • Ligaments – 1 layer of tough connective tissue that holds bones together
  • Synovial fluid – 2nd layer allows surfaces of joints to slide smoothly
slide12

Section 36-1

F. Skeletal System Disorders

Inflammation

Osteoporosis