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Ch 7 A&P 1
Axial Skeleton & Termonology
Question | Answer |
---|---|
The principal division of the skeletal system that consists of 80 bones | Axial Skeleton |
The principal division of the skeletal system that consists of 126 bones | Appendicular Skeleton |
The 2 divisions of the skeletal system | Axial & Appendicular |
Skull, ear bones, hyoid bone, ribs, sternum, & bones of the vertebral column are in the | Axial Skeleton system |
Bones in the upper & lower limbs & bones forming the shoulder & pelvic area that connect limbs to skeleton | Appendicular Skeleton system |
5 types of bones based on SHAPE | Long, short, flat, irregular, & sesamoid |
Jointed areas where flat bones come together | Sutures |
2 major types of structural features | Depressions & openings, Processes |
Furrow on a bone for passage of blood vessel, nerve or tendon | Sulcus |
Largest and strongest facial bone, only moveable skull bone | The Mandible |
Mucous membrane-lined cavities in the frontal, maxillary, sphenoid & ethmoid bones | Paranasal sinuses |
Filled spaces between cranial bones present at birth | Mesenchyme |
These separate the vertebrae from one another | Intervertebral disc |
Each disc has an outer ring of fibrocartilage which surrounds soft pulpy nucleus | Annulus Fibrosus |
There are 7 vertebra in this region | Cervical vertebrae |
There are 12 vertebrae in this region | Thoracic vertebrae |
There are 5 vertebrae in this region | Lumbar Vertebrae |
The first 2 vertebrae are different from the other in... | Shape and function |
Atlas C1 allows for | nodding "yes" |
Axis C2 allows for | Shaking head "no" |
This supports the ribs & has special structures for rib head & tubercle attachment ( Giraffe face shape) | Thoracic vertebrae |
This is the largest & strongest in the vertebral column- support the body's weight (moose head shape) | Lumbar Vertebrae |
Composed of 5 vertebrae that begin to fuse together between 16 & 18 yrs (pelvic girdle) | Sacral Spine |
Also know as the breastbone - flat & located in the center of the anterior thoracic wall | Sternum |
These provide support to the thoracic cavity - twelve pairs | Ribs |
Number of True Ribs, False Ribs, & Floating Ribs | True- 1-7, False- 8,9,10 Floating Ribs- 11 & 12 |
In the vertebral column- may occur due to trauma or simply associated with aging | Herniated Disc |
Increased lateral curvature | Scoliosis |
Increased Thoracic curve-bent forward | Kyphosis |
Increased lumbar curve-bent backwards | Lordosis |
Congenital defect of the vertebral column where the Laminae do not develop normally | Spina Bifida |