Axial Skeleton Overview Quiz
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Questions and Answers

What part of the skeleton does the axial skeleton refer to?

  • Bones of the head and trunk (correct)
  • Only the skull
  • Limbs and girdles
  • Nerves and tissues
  • What is the definition of the skull?

    A framework of bone or cartilage enclosing the brain of a vertebrate.

    What is the cranium?

    The part of the skull enclosing the brain.

    What region is the frontal bone located in?

    <p>Forehead region.</p> Signup and view all the answers

    What do the parietal bones form in the skull?

    <p>The sides and roof of the cranium.</p> Signup and view all the answers

    What is the function of the temporal bone?

    <p>Forms part of the side of the skull and encloses the middle and inner ear.</p> Signup and view all the answers

    Where is the sphenoid bone located?

    <p>At the base of the cranium, behind the eye and below the front part of the brain.</p> Signup and view all the answers

    What shape is the occipital bone?

    <p>Trapezoidal shape.</p> Signup and view all the answers

    What is the definition of external auditory meatus?

    <p>A tube running from the outer ear to the middle ear.</p> Signup and view all the answers

    What passes through the foramen magnum?

    <p>The spinal cord.</p> Signup and view all the answers

    What do the nasal bones form?

    <p>The bridge of the nose.</p> Signup and view all the answers

    Where is the ethmoid bone located?

    <p>At the roof of the nose and between the two orbits.</p> Signup and view all the answers

    What is the lacrimal bone?

    <p>A small bone forming part of the eye socket.</p> Signup and view all the answers

    What does the zygomatic bone form?

    <p>The prominent part of the cheek and the outer side of the eye socket.</p> Signup and view all the answers

    What is the maxilla?

    <p>The upper jaw.</p> Signup and view all the answers

    What is the mandible?

    <p>The lower jawbone.</p> Signup and view all the answers

    What does the hyoid bone support?

    <p>The tongue.</p> Signup and view all the answers

    What is another term for the vertebral column?

    <p>Spine or backbone.</p> Signup and view all the answers

    What do cervical vertebrae do?

    <p>Support the head, protect the spinal cord, and provide mobility to the head and neck.</p> Signup and view all the answers

    How many thoracic vertebrae are there?

    <p>Twelve.</p> Signup and view all the answers

    What are lumbar vertebrae?

    <p>The five vertebrae between thoracic and sacral vertebrae.</p> Signup and view all the answers

    What is the sacrum?

    <p>A triangular bone formed from fused vertebrae.</p> Signup and view all the answers

    What is the coccyx?

    <p>A small, triangular bone at the base of the spinal column.</p> Signup and view all the answers

    What does the thorax refer to in mammals?

    <p>The part of the body between the neck and abdomen.</p> Signup and view all the answers

    What is the sternum commonly known as?

    <p>Breastbone.</p> Signup and view all the answers

    What do ribs protect?

    <p>The thoracic cavity and its organs.</p> Signup and view all the answers

    Study Notes

    Axial Skeleton Overview

    • Comprises bones of the head and trunk in vertebrates.
    • In humans, consists of 80 bones.

    Skull

    • Framework of bone or cartilage encasing the brain.

    Cranial Bones

    • Cranium: Encloses the brain.
    • Frontal Bone: Located in the forehead region.
    • Parietal Bone: Forms sides and roof of the cranium; quadrilateral in shape.
    • Temporal Bone: Encloses middle and inner ear, located at the sides of the skull.
    • Sphenoid Bone: Base of the cranium, features lateral wings and air-filled sinuses.
    • Occipital Bone: Trapezoidal shape, located at the lower back of the cranium.
    • Ethmoid Bone: Separates nasal cavity from the brain; located at the roof of the nose.
    • Nasal Bone: Forms the bridge of the nose; two small oblong bones.
    • Lacrimal Bone: Part of the eye socket.
    • Zygomatic Bone: Forms the cheek's prominence and outer eye socket.

    Jaw and Hyoid Bones

    • Maxilla: The upper jaw in vertebrates.
    • Mandible: The lower jaw, especially in mammals and fishes.
    • Hyoid: U-shaped bone in the neck, supports the tongue.

    Vertebral Column

    • Also known as the spine or backbone.
    • Cervical Vertebrae: Small and delicate; support the head and protect the spinal cord.
    • Thoracic Vertebrae: Twelve bones attached to the ribs.
    • Lumbar Vertebrae: Five vertebrae between the thoracic and sacral vertebrae.
    • Sacrum: Triangular bone in the lower back, formed from fused vertebrae and positioned between hipbones.
    • Coccyx: Small, triangular bone at the spinal column's base.
    • Thorax: Area between neck and abdomen; encases vital organs of circulation and respiration.
    • Sternum: Breastbone; relevant in cardiopulmonary resuscitation (CPR).
    • Ribs: Twelve pairs of curved bones protecting the thoracic cavity and its organs.

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    Description

    Test your knowledge on the axial skeleton and its components, including the various cranial bones and jaw structures. This quiz will cover the key features and functions of the bones in the head and trunk of vertebrates. Perfect for students studying human anatomy.

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