Viscerocranium and the Orbit (Skull Part B 2)

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Questions and Answers

What is another name for the viscerocranium?

  • Cranial skeleton
  • Facial skeleton (correct)
  • Spinal skeleton
  • Thoracic skeleton

What paired structures are separated by the nasal cavity?

  • The maxillae
  • The orbits (correct)
  • The zygomatics
  • The mandibles

What do the orbits enclose?

  • The nasal cavity
  • The sinuses
  • The eyeballs (correct)
  • The oral cavity

Which of the following bones does NOT form part of the orbit?

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

How many bones form the orbit?

<p>7 (B)</p> Signup and view all the answers

Which bone is located in the anterior part of the cranium and contributes to the formation of the orbit?

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

Which of these bones is located towards the back of the skull and does NOT form part of the orbit?

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

Which of the following is the smallest of the bones that contribute to the orbit?

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

Which bone contributes to both the orbit and the nasal cavity?

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

Which of these bones contributes to the inferior part of the orbit?

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

Which of the following bones is paired?

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

What is the shape of the sphenoid bone?

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

What is the name for the cheekbone?

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

What two structures are enclosed by the orbits?

<p>Eyes and ocular muscles (C)</p> Signup and view all the answers

In anatomical terms, what is the best description of the relationship between the two orbits?

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

Which of the following bones is thin and scale-like and forms part of the medial wall of the orbit?

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

Which of the following is NOT one of the main functions of the orbit?

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

Which bone is situated at the anterior part of the skull immediately above the eyes?

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

What structure separates the paired orbits?

<p>The nasal cavity (A)</p> Signup and view all the answers

Which bone spans the width of the skull and forms part of the central skull base and also parts of the orbit?

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

Flashcards

Viscerocranium

The part of the skull that forms the face, also known as the facial skeleton.

The Orbit

Symmetrical, paired structures separated by the nasal cavity that enclose the eyeballs and their associated structures.

Bones forming the orbit

Sphenoid, Frontal, Zygomatic, Ethmoid, Lacrimal, Maxilla, Palatine

Study Notes

Viscerocranium

  • The viscerocranium is also known as the facial skeleton.
  • The orbit is part of the viscerocranium.

The Orbit

  • The orbits are symmetrical paired structures.
  • The nasal cavity separates the paired structures.
  • The orbits enclose the eyeballs.
  • The orbits enclose the associated structures of the eye.
  • The sphenoid bone forms the orbit.
  • The frontal bone forms the orbit.
  • The zygomatic bone forms the orbit.
  • The ethmoid bone forms the orbit.
  • The lacrimal bone forms the orbit.
  • The maxilla bone forms the orbit.
  • The palatine bone forms the orbit.

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