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The Skeletal System

Structure and functions of the skeleton

  • 3 things to know
  • A2 2

Overview

The number of bones, axial and appendicular skeletons, the vertebral column, bone types and the patella, the functions of the skeleton, blood cell production, minerals and the structure of a long bone.

What you need to know

Answer each one before you reveal it.

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Key term

Which bones form the axial and appendicular skeletons, and what does each part do?

Key term

Describe the structure of a long bone, and compare compact bone with spongy bone.

Numbers

How many bones make up the adult human skeleton?

Questions from this subtopic

Each one with the model answer underneath.

  1. 1

    How many bones make up the adult human skeleton?

    Model answer

    The adult skeleton has 206 bones. The bones are grouped into the axial skeleton and the appendicular skeleton.

  2. 2

    Which bones form the axial skeleton?

    Model answer

    The axial skeleton is made up of the skull, vertebral column, ribs and sternum. The axial skeleton forms the central axis of the body and protects the vital organs.

  3. 3

    Which bones form the appendicular skeleton?

    Model answer

    The appendicular skeleton is made up of the bones of the arms and legs and the shoulder and pelvic girdles. The girdles attach the limbs to the axial skeleton.

  4. 4

    State the five regions of the vertebral column and the number of vertebrae in each.

    Model answer

    The vertebral column has 7 cervical, 12 thoracic and 5 lumbar vertebrae. The sacrum is 5 fused vertebrae and the coccyx is about 4 fused vertebrae.

  5. 5

    What is the role of long bones in sport?

    Model answer

    Long bones act as levers, allowing large and fast movements of the limbs. The femur and humerus are long bones.

  6. 6

    Why are short bones such as the carpals and tarsals suited to their role?

    Model answer

    Short bones are small, strong and roughly cube-shaped. Short bones bear weight and allow stable, finely controlled movement at the wrist and ankle.

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