The skeleton (axial & appendicular) Flashcards
How many bones make up the axial skeleton?
80
The skull protects
the brain, entrances to the respiratory system, and entrance to the digestive system
The cranial cavity consists of:
fluids, blood vessels, nerves, and membranes
Deep facial bones separate:
the oral and nasal cavities and form the nasal septum
What are the four major sutures?
lamdoidal, coronal, squamous, sagittal
Function of the hyoid bone
supports the larynx
True or False: The hyoid bone does NOT articulate with any other bones
TRUE
Marks of the hyoid bone:
body, greater horns, and lesser horns
Fontanels
areas of fibrous connective tissue (soft spots)
How many bones are in the vertebral column?
24 vertebrae
the sacrum
the coccyx
How many cervical vertebrae?
7
How many thoracic vertebrae?
12
How many lumbar vertebrae?
5
Primary curves (spine)
acomodate for internal organs
thoracic and sacral curves
Secondary curves (spine)
AKA compression curves that shift body weight for upright posture
lumbar and cervical curves
What are the 3 parts of the vertebrae?
Vertebral body (centrum)
Vertebral arch
Articular processes
Invertebral discs
pads of fibrocartilage that separate the vertebral bodies and absorbs shock
The atlas (C1):
Articulates with the occipital condyles of the skull
The Axis (C2):
Supports the atlas
Vertebrae prominens (C7):
transitions to thoracic vertebrae
Whiplash
a traumatic dislocation of cervical vertebrae
T1-T10 vertebrae:
have contact with costal cartilage and transverse costal facets
T1-T8 vertebrae:
articulate with 2 pairs of ribs at superior and inferior costal facets
T9-T11 vertebrae:
articulate with one pair of ribs
T10-T12 vertebrae:
transition to lumbar vertebrae
True or False: The sacrum is more curved in males than females
TRUE
The adult sacrum consists of how many fused sacral vertebrae?
5
At what age is the sacral vertebrae fuse together?
between 25-30
A mature coccyx consists of how many coccygeal vertebrae?
replaces the vertebral canal3-5
The first __ coccygeal vertebra have transverse processes and unfused vertebral arches
2
The thoracic cage consists of:
thoracic vertebrae, ribs, sternum
How many pairs of ribs are there?
12 (24 in total)
True ribs
ribs 1-7
connected to the sternum by costal cartilage