Questions and Answers
What is the frontal bone?
Forehead bone
What is the zygomatic bone?
Cheekbone
What is the mandible?
Lower jaw
What is the nasal bone?
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What are the palatine bones?
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What does the parietal bone form?
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What is the occipital bone?
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Describe the sphenoid bone.
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What is the lacrimal bone?
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What is the maxilla?
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What does the ethmoid bone do?
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Where is the site of the mastoid process?
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What is the sella turcica?
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What is the cribriform plate?
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Where is the mental foramen located?
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Which bones are the site of styloid processes? (Select all that apply)
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How many bones contain paranasal sinuses?
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What are the occipital condyles?
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Where is the foramen magnum found?
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What is the hyoid bone?
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What is found in the middle ear?
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Which bones comprise the nasal septum? (Select all that apply)
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What is the crista galli?
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Which bones contain alveoli bearing teeth? (Select all that apply)
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Which bones are connected by the lambdoid suture? (Select all that apply)
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Which bones are connected by the squamous suture? (Select all that apply)
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Study Notes
Axial Skeleton Overview
- The axial skeleton consists of bones that form the central axis of the body, including the skull, vertebral column, and rib cage.
Key Bones of the Skull
- Frontal Bone: Forms the forehead region, contributing to the protection of the brain.
- Zygomatic Bone: Known as the cheekbone, it provides facial structure and support.
- Mandible: The lower jaw bone; the only movable bone of the skull responsible for chewing.
- Nasal Bone: Composes the bridge of the nose, supporting the structure of the nasal cavity.
- Palatine Bone: Forms the posterior section of the hard palate, crucial for the separation of oral and nasal cavities.
- Parietal Bone: Covers much of the lateral and superior sections of the cranium, providing structural strength.
- Occipital Bone: The most posterior part of the skull; contains vital openings for the spinal cord.
- Sphenoid Bone: A unique, bat-shaped bone part of the cranial floor, significance includes housing the sella turcica, which holds the pituitary gland.
- Lacrimal Bone: Small bones in the medial wall of each orbit that house the tear ducts.
- Maxilla: Forms the upper jaw and central part of the hard palate.
- Ethmoid Bone: Contributes to the nasal structure with superior and medial nasal conchae; includes the cribriform plate and crista galli for olfactory function.
Structures and Functions within the Skull
- Mastoid Process: Located on the temporal bone; serves as an attachment point for neck muscles.
- Alveoli: The maxilla and mandible contain these sockets for teeth.
- Nasal Septum: Comprised of the vomer and ethmoid bones, it divides the nasal cavity.
- Foramen Magnum: An opening in the occipital bone, allowing for the spinal cord to connect with the brain.
- Condyles: On the occipital bone, these articulate with the atlas (the first cervical vertebra), allowing head movement.
Sutures Connecting Skull Bones
- Lambdoid Suture: Connects the occipital bone with the parietal bones.
- Squamous Suture: Joins the temporal bones with the parietal bones.
Miscellaneous
- Hyoid Bone: A U-shaped bone in the neck that provides attachment for tongue muscles.
- Middle Ear: Located within the temporal bone, it is essential for hearing.
- Paranasal Sinuses: The sphenoid bone houses four sinuses that help with respiratory function.
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Description
Test your knowledge of the axial skeleton with these flashcards. Each card provides a term related to the skull and facial structure along with its definition. Perfect for students studying anatomy.