Podcast
Questions and Answers
What is the definition of the frontal bone?
What is the definition of the frontal bone?
- Bony skeleton of nose
- Bone forming anterior cranium (correct)
- Cheekbone
- Upper jaw
What is the cheekbone called?
What is the cheekbone called?
zygomatic
What is the upper jaw called?
What is the upper jaw called?
maxilla
What bone forms the bony skeleton of the nose?
What bone forms the bony skeleton of the nose?
What forms the posterior roof of the mouth?
What forms the posterior roof of the mouth?
Which bones are united by the sagittal suture?
Which bones are united by the sagittal suture?
Where is the site of the jugular foramen and carotid canal?
Where is the site of the jugular foramen and carotid canal?
What contains a 'saddle' that houses the pituitary gland?
What contains a 'saddle' that houses the pituitary gland?
Which bone allows tear ducts to pass?
Which bone allows tear ducts to pass?
What bone forms most of the hard palate?
What bone forms most of the hard palate?
Which bone has the superior and medial nasal conchae?
Which bone has the superior and medial nasal conchae?
Where is the site of the external auditory meatus?
Where is the site of the external auditory meatus?
What has greater and lesser wings?
What has greater and lesser wings?
Which bone allows olfactory fibers to pass through its 'holey' plate?
Which bone allows olfactory fibers to pass through its 'holey' plate?
What facial bone contains a sinus?
What facial bone contains a sinus?
Which cranial bones contain paranasal sinuses?
Which cranial bones contain paranasal sinuses?
What are the oval-shaped protrusions that articulate with the atlas?
What are the oval-shaped protrusions that articulate with the atlas?
Through what does the spinal cord pass in the occipital bone?
Through what does the spinal cord pass in the occipital bone?
The hyoid is classified as a skull bone.
The hyoid is classified as a skull bone.
What forms the chin?
What forms the chin?
What forms the inferior part of the nasal septum?
What forms the inferior part of the nasal septum?
Which bones contain alveoli bearing teeth?
Which bones contain alveoli bearing teeth?
Name the three major components of the Axial Skeleton.
Name the three major components of the Axial Skeleton.
What structure(s) does the skull protect?
What structure(s) does the skull protect?
What structure(s) does the vertebral column protect?
What structure(s) does the vertebral column protect?
What structure(s) does the bony thorax protect?
What structure(s) does the bony thorax protect?
Define 'suture'.
Define 'suture'.
With one exception, all the skull bones are joined together by sutures. What is this exception?
With one exception, all the skull bones are joined together by sutures. What is this exception?
What connects the parietal bones?
What connects the parietal bones?
What connects the parietal and frontal bones?
What connects the parietal and frontal bones?
What connects the temporal bones?
What connects the temporal bones?
What connects the occipital and parietal bones?
What connects the occipital and parietal bones?
What eight bones compose the cranium?
What eight bones compose the cranium?
What are the functions of the sinuses?
What are the functions of the sinuses?
What are orbits?
What are orbits?
Why is the Sphenoid Bone considered the 'keystone' of the cranial floor?
Why is the Sphenoid Bone considered the 'keystone' of the cranial floor?
Compare the adult and fetal skulls.
Compare the adult and fetal skulls.
What are fontanels?
What are fontanels?
What is the fate of a fontanel?
What is the fate of a fontanel?
What is the function of the fetal fontanel?
What is the function of the fetal fontanel?
What vertebral type has a forked spinous process?
What vertebral type has a forked spinous process?
Which vertebra lacks a body?
Which vertebra lacks a body?
What vertebrae bear facets for articulation with ribs?
What vertebrae bear facets for articulation with ribs?
What forms a joint with the hip bone?
What forms a joint with the hip bone?
Which vertebra has a block-like body and short stout spinous process?
Which vertebra has a block-like body and short stout spinous process?
What is the tailbone called?
What is the tailbone called?
What kind of tissue makes up the intervertebral disks?
What kind of tissue makes up the intervertebral disks?
What is the shape of the thoracic cage?
What is the shape of the thoracic cage?
Study Notes
Axial Skeleton Overview
- The axial skeleton consists of the skull, vertebral column, and bony thorax.
- It plays a crucial role in protecting vital organs like the brain, spinal cord, and thoracic organs.
Skull Components
- Frontal Bone: Forms the anterior part of the cranium.
- Zygomatic Bone: Also known as the cheekbone.
- Maxilla: Forms the upper jaw and most of the hard palate.
- Nasal Bone: Comprises the bony skeleton of the nose.
- Palatine Bone: Makes up the posterior roof of the mouth.
- Parietal Bones: A pair of bones united by the sagittal suture.
- Temporal Bone: Contains jugular foramen and carotid canal; site of external auditory meatus.
- Sphenoid Bone: Houses the pituitary gland in its saddle structure, features greater and lesser wings.
- Lacrimal Bone: Enables passage for tear ducts.
- Ethmoid Bone: Contains superior and medial nasal conchae; has a "holey" plate for olfactory fibers.
- Mandible: The lower jaw that forms the chin, contains a sinus, and is held together by a freely movable joint (exception among skull bones).
- Occipital Bone: Oval-shaped protrusions articulate with the atlas; features a large opening for the spinal cord.
Nasal Structures
- Vomer: Forms the inferior part of the nasal septum.
Bone Sutures
- Suture: An interlocking immovable joint connecting skull bones.
- Sagittal Suture: Connects the parietal bones.
- Coronal Suture: Connects the parietal and frontal bones.
- Squamous Suture: Connects the temporal bones.
- Lambdoid Suture: Connects the occipital and parietal bones.
Fetal vs Adult Skull
- The adult skull accounts for 1/8 of body length, while the fetal skull is 1/11.
- Fontanels: Fibrous membranes on a baby's head that allow for skull flexion during childbirth; typically close by 22 months.
Vertebral Column
- Cervical Vertebrae: Characterized by a forked spinous process.
- Atlas: The first cervical vertebra, notable for lacking a body.
- Thoracic Vertebrae: Bear facets for rib articulation, contributing to the bony thoracic cage.
- Lumbar Vertebrae: Larger, block-like body with a short stout spinous process.
- Sacrum: Connects with the hip bone.
- Coccyx: The tailbone, a small triangular bone at the base of the vertebral column.
- Intervertebral Disks: Composed of fibrocartilage, providing cushioning between vertebrae.
Thoracic Cage
- The thoracic cage has a cone shape, functioning to protect the organs within the thorax.
- Sinuses lighten skull bones and amplify sound.
Miscellaneous
- Three cranial bones - sphenoid, frontal, and ethmoid - contain paranasal sinuses.
- The entire structural integrity relies on the interconnected design of the skull bones, with the sphenoid bone often referred to as the "keystone" of the cranial floor.
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Description
Test your knowledge of the axial skeleton with these flashcards! This quiz covers essential bones such as the frontal, zygomatic, maxilla, and more. Perfect for students studying anatomy or preparing for exams.
