The Cranium
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Questions and Answers

Which type of bone is the occipital bone classified as?

  • Irregular bone
  • Long bone
  • Short bone
  • Flat bone (correct)

What is one of the primary functions of the occipital bone?

  • Provide attachment for muscles
  • Form the foramen magnum (correct)
  • Protect the brain
  • Support the spine

Which of the following bones articulates with the occipital bone?

  • Humerus
  • Coxal bone
  • Scapula
  • Parietal bone (correct)

What type of blood supply does the occipital bone receive?

<p>Middle meningeal artery (A)</p> Signup and view all the answers

Which part of the temporal bone is NOT listed in its subdivisions?

<p>Condyle (D)</p> Signup and view all the answers

Which bone is NOT a part of the cranium?

<p>Mandible (C)</p> Signup and view all the answers

How many Parietal bones are present in the cranium?

<p>2 (A)</p> Signup and view all the answers

What is the primary function of the Frontal bone?

<p>Protects the frontal lobe of the brain (D)</p> Signup and view all the answers

Which of the following bones articulates with the Frontal bone?

<p>Maxillae (C), Zygomatic (D)</p> Signup and view all the answers

Which artery supplies blood to the Frontal bone?

<p>Middle meningeal artery (A)</p> Signup and view all the answers

What type of bone are the Parietal bones classified as?

<p>Flat bones (A)</p> Signup and view all the answers

Which bone articulates with both the Frontal bone and the Sphenoid bone?

<p>Ethmoid bone (B)</p> Signup and view all the answers

What is FALSE about the Sphenoid bone?

<p>It provides structure to the upper face (C)</p> Signup and view all the answers

Which bones make up the cranium?

<p>Frontal and Parietal (A)</p> Signup and view all the answers

Flashcards

Occipital bone

A flat, curved bone that forms the back of the skull and contributes to the base of the skull.

Foramen magnum

The large opening at the base of the skull, where the spinal cord connects to the brain.

Parietal bone

A flat, curved bone that forms the sides and roof of the skull.

Middle meningeal artery

A major artery that supplies blood to the membranes surrounding the brain.

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Sphenoid bone

A complex, butterfly-shaped bone situated at the base of the skull. It forms part of the floor of the cranial cavity and sides of the skull.

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Mandible

The only movable bone in the skull that makes up the lower jaw

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Maxillae

The largest and strongest bone of the face, forming part of the upper jaw and the hard palate.

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Ethmoid bone

A bone that forms part of the roof of the nasal cavity, the floor of the cranium, and the medial walls of the orbits (eye sockets).

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Frontal bone

The largest and strongest bone in the skull, forming the forehead and part of the roof of the skull.

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Parietal bones

There are 2 Parietal bones, one on each side of the skull.

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Study Notes

The Cranium

  • The cranium is comprised of 8 bones.

Frontal Bone

  • Type: Flat bone
  • Parts: Squamous, orbital, and nasal.
  • Location: At the front of the cranium.
  • Articulates: With parietal bones, ethmoid bone, lacrimal bones, maxillae, nasal bones, zygomatic bones, and sphenoid bone.
  • Blood Supply: Middle meningeal artery.
  • Functions:
    • Provides structure to the skull, eye orbits, and upper face.
    • Protects the frontal lobe of the brain.
    • Aids in facial expressions.

Parietal Bones

  • Type: Flat bones.
  • Parts: Frontal, occipital, sphenoidal, and mastoid angles.
  • Location: Articulate with the frontal bone, occipital bone, temporal bone, and sphenoid bone.
  • Blood Supply: Middle meningeal artery.
  • Functions:
    • Provide structure to the skull.
    • Form the roof and sides of the cranium.

Occipital Bone

  • Type: Flat bone.
  • Parts: Squamous, basilar, and lateral.
  • Location: Articulates with parietal bones, temporal bones, sphenoid bone, and atlas.
  • Blood Supply: Middle meningeal artery.
  • Functions:
    • Provides structure to the skull.
    • Provide attachment for muscles.
    • Forms the foramen magnum.

Temporal Bones

  • Type: Irregular bones.
  • Parts: Squamous, Petrous, Tympanic, Mastoid, and Styloid.
  • Location: Articulates with parietal bone, occipital bone, and zygomatic bone.

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Description

Explore the anatomy of the cranium and its key components including the frontal, parietal, and occipital bones. This quiz covers their types, locations, functions, and articulations with other bones. Test your knowledge on cranial anatomy and understand its significance in protecting the brain.

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