Chapter 8 - Skeletal System Flashcards
The axial skeleton is composed of what?
80 bones of the head, neck, and torso & 74 bones that form the upright axis of the body and 6 tiny middle-ear bones
The appendicular skeleton is composed of?
126 bones that form the appendages to the axial skeleton; the upper and lowe extremeties &pelvis
Skull is composed of how many bones?
28 bones (cranial and facial bones)
Frontal bones:
forms the forehead and anterior part of the cranium, contains frontal sinuses
Parietal bones:
form the buldging top of the cranium, form several suture
Temporal bones:
form the lower sides of the cranium and part of the cranial floor, contains the inner and middle ear
Occipital bones:
forms the lower, posterior part of the skull, forms immovable joints
Sphenoid bones:
bat shaped bone located in the central portion of the cranial floor, anchors the frontal, parietal, occipital, and ethmoid bones and forms part of the lateral wall of the cranium and part of the floor of each orbit
Ethmoid bones:
irregular bone that lies anterior ro the sphenoid and posterior to the nasal bones, forms anterior cranial floor, medial orbit walls, ipper parts of the nasal septum, and side walls of the nasal cavity
Facial bone consists of?
mandible, zygomatic bone, nasal bone, lacrimal bone, palatine bone, inferior nasal conchae, and vomer bone
Temporal bones:
form the lower sides of the cranium and part of the cranial floor, contains the inner and middle ear
Temporal bones:
form the lower sides of the cranium and part of the cranial floor, contains the inner and middle ear
Occipital bones:
forms the lower, posterior part of the skull, forms immovable joints
Occipital bones:
forms the lower, posterior part of the skull, forms immovable joints
Sphenoid bones:
bat shaped bone located in the central portion of the cranial floor, anchors the frontal, parietal, occipital, and ethmoid bones and forms part of the lateral wall of the cranium and part of the floor of each orbit