chapter 7 & 8- skeletal system Flashcards
what are the 8 bones that make up the cranium?
occipital, parietal (2), frontal, temporal (2), sphenoid, ethmoid
what are the 14 bones that make up the face?
mandible, vomer, maxillary (2), palatine (2), nasal (2), inferior nasal conchae (2), zygomatic (2), lacrimal (2)
what is the suture located between the occipital bone & parietal bones?
lambdoid
what are the bones that contain sinuses?
sphenoid, ethmoid, frontal, palatine, maxillary
at what age does the cranium reach maximum size?
5
how many thoracic vertebrae are in a human?
12
what counts as one bone in the adult human but is composed of 5 fused vertebrae?
sacrum
what is the abnormal condition of lateral curvature of the spine?
scoliosis
there is no intervertebral disc between which two vertebrae?
C1 & C2
what is the gel-like material inside the annulus fibrosis of the intervertebral disc?
nucleus pulposus
the vertebral foramen is the hole through which the what passes?
spinal cord
a lack of folic acid early in pregnancy can lead to what in the fetus, a condition where the vertebral arch fails to develop?
spina bifida
how many of the 24 ribs don’t attach at all to the sternum?
4 (floating ribs)
what are the names of the 2 bones of the antebrachial region?
ulna & radius
how many carpal bones are in one human wrist?
8
how many phalanges are in one human foot?
14
what is the big bone that spans from the hip to the knee?
femur
how many bones are in the human skeleton?
206 bones
axial skeleton
longitudinal axis with 80 bones
appendicular skeleton
-limbs with 126 bones
-consists of limbs & limb girdles to provide movement
axial skeleton functions
- support & protect organs in dorsal & ventral body cavities
- provide surface area for muscle attachment
a. adjust position of head, neck & trunk
b. perform respiratory movements
c. stabilize appendicular skeleton
skull (26 bones)
-cranium: occipital (1), parietal (2), frontal (1), temporal (2), sphenoid, ethmoid
-face: maxillary (2), palatine (2), nasal (2), vomer, inferior nasal conchae (2), zygomatic (2), lacrimal (2), mandible
-auditory ossicles (6)
-hyoid bone
sutures
skull bones interconnect at immovable joints (dense fibrous C.T.)
lambdoid suture
separates occipital bone from parietal bones