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Questions and Answers
How many bones compose the axial skeletal system?
How many bones compose the axial skeletal system?
80
Which classification of bones is cube-shaped and nearly equal in length and width?
Which classification of bones is cube-shaped and nearly equal in length and width?
- Short bones (correct)
- Flat bones
- Irregular bones
- Long bones
Flat bones are generally thick and consist of a single layer of bone tissue.
Flat bones are generally thick and consist of a single layer of bone tissue.
False (B)
What is a major function of the axial skeletal system?
What is a major function of the axial skeletal system?
What is a 'condyle'?
What is a 'condyle'?
Which bone is referred to as the 'keystone' of the cranial floor?
Which bone is referred to as the 'keystone' of the cranial floor?
What are the bones that form the orbit?
What are the bones that form the orbit?
The mandible is the only movable bone in the skull.
The mandible is the only movable bone in the skull.
What is the anatomical term for a passageway through a bone?
What is the anatomical term for a passageway through a bone?
The nasal septum is formed by the _____ plate of the ethmoid and the _____ bone.
The nasal septum is formed by the _____ plate of the ethmoid and the _____ bone.
Match the following bones with their descriptions:
Match the following bones with their descriptions:
What is a deviated septum?
What is a deviated septum?
What is the function of the superior and middle conchae?
What is the function of the superior and middle conchae?
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Study Notes
Axial Skeleton
- The axial skeleton is composed of 80 bones.
- It provides support and protection for the head, neck, and trunk.
Bone Classification
- Short bones are cube-shaped and nearly equal in length and width.
- Flat bones are generally thin and consist of two layers of compact bone separated by a layer of spongy bone.
Axial Skeleton Functions
- The axial skeleton supports the head, neck, and trunk.
- It protects vital organs such as the brain, spinal cord, heart, and lungs.
- It provides attachment sites for muscles that facilitate movement.
Anatomical Terminology
- A condyle is a rounded projection on a bone that articulates with another bone.
- A foramen is a passageway through a bone.
Cranial Floor
- The sphenoid bone is referred to as the 'keystone' of the cranial floor, as it contributes to the formation of numerous cranial fossae.
Orbital Bones
- The bones that form the orbit (eye socket) include the frontal, sphenoid, zygomatic, maxilla, lacrimal, ethmoid, and palatine bones.
Mandible
- The mandible is the only movable bone in the skull.
Nasal Septum
- The nasal septum is formed by the perpendicular plate of the ethmoid and the vomer bone.
Deviated Septum
- A deviated septum occurs when the nasal septum is displaced to one side, restricting airflow through the nose.
Conchae
- The superior and middle conchae create turbulence in the nasal cavity to increase the surface area for air contact and facilitate warming, humidifying, and filtering air.
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