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The Skeletal System: Structure, Function, and Types of Bones, Lecture notes of Anatomy

An in-depth exploration of the skeletal system in animal science. It discusses the purpose of the skeletal system, the composition of bones, and the different types of bones, including long, short, flat, and irregular bones. The document also covers the role of joints and ligaments, connective tissues, and bone cells.

Typology: Lecture notes

2021/2022

Uploaded on 09/12/2022

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The Skeletal System
Animal Science
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The Skeletal System

Animal Science

What is the purpose of a skeletal

system?

  • Provides the frame and support for all the

other systems and organs

  • Aids in movement
  • Provides protection
  • Site of mineral storage
  • Site of blood cell formation
  • Made up of bones,

cartilage, and

connective tissue

4 Bone Shapes

• Long

• Short

• Flat

• Irregular

Types of bones in the animal body

  • Long Bones—
    • Serve as support columns
    • Provide support for the body giving it the rigidity (hardness) necessary to stand and move
    • Example: Leg Bones

Types of bones in the animal body

  • Flat Bones
    • Relatively thin and flat and usually curved
    • Protect vital organs such as the brain, the heart, and the lungs
    • Are longer and wider than they are thick
    • Usually multiple bones fused together
    • Example: Scapula, Skull, Ribs

Types of bones in the animal body

  • Irregular Bones
    • Irregularly shaped
    • Important to the protection and support of the central nervous system
    • Points of some muscle attachment
    • Example: Vertebrae These bones make up the backbone, which is not a single bone, but a series of irregular bones. They flex and bend to give the animal movement. The vertebrae are divided into several different areas: Cervical, Thoracic, Lumbar, Sacral, and Coccygeal.

Joints and Ligaments

  • Joints are connections of bone in the animal’s

body to make up the skeletal system.

  • The connections are held together by bands of

tough tissue called ligaments that bind the

bone to the joints.

  • Ligaments give the joints flexibility and serve as shock absorbers to protect the ends of bones.

Joints are classified by the way they

move…

Review

Three types of bone cells...

• Osteoblasts -­‐ lay down the collagen matrix

• Osteocytes -­‐ maintain the matrix

• Osteoclasts -­‐ release minerals from the bones

Equine

Porcine

How could you FIX a broken bone?

Fixing animal bone breaks

• Must hold weight of the animal

• Bone must be usable when it heals

• Hard to keep cast in place, clean and dry

CAST OR SPLINT