Axial Skeleton Flashcards
How many bones make up the Axial skeleton?
80
What composes the axial skeleton?
Sinuses
Sutures
Fontaneros
Skill
Hyboid
Vertebral column
Thoracic Cage
Paranasal Sinuses
Cavities in bones of the skull that communicate with the nasal cavity
What cranial bones contain the sinuses?
Frontal
Sphenoid
Ethmoid
Maxillae
What is the function of paranasal sinuses?
Lined with a mucous membrane, they lighten the skull and have resonating chambers for speech
Name these areas of the paranasal sinus L to R
Frontal sinus, ethmoid sinus, and the sphenoid sinus
Immovable joints found only between skull bones
Sutures
What is a joint functional classification?
A classification based on what movement a joint can do
Immovable joint classification
Synarthrosis
Slightly movable joint classification
Amphiarthrosis
Freely movable joint classification
Diarthrosis
What functional classification is all synovial joints?
Diarthrosis (freely movable)
What is Structural Classification?
What kind of C.T. binds the bones together.
Lacks a synovial cavity, connected by fibrous CT, rich in collagen fibers
Fibrous joints
3 types of fibrous joints
Sutures
Syndesmosis
Interosseous membranes
Where do you find Interosseous membranes?
Between the radius and the ulna and the tibia and fibula
Where do you find Synesmosis joints?
Joints where ligaments are used to attach the bone
Label the fetal skull (L down, then R down)
L: Parietal bone, Future squamous suture, posterior fontanel, future lamboid suture, posterolateral fontanel, occipital bone.
R: Anterior Fontanel, future coronal suture, anterolateral fontanel, sphenoid bone, temporal bone
What are fontanels?
Dense CT membrane filled spaces between the cranial bones of fetuses and infants
What are the major fontanels?
Anterior, posterior, anterolateral and posterolateral fontanels
2 major functions of fontanels
Allows fetal skeleton to modify its shape as it passes through the birth canal
Permits rapid growth of the brain during infancy
How many bones is the skull made up of?
22 bones
Label the skull structures top to bottom
Coronal suture
Supraorbital foramen
Supraorbital margin
Optic formen (canal)
Superior orbital fissure
Temporal bone
Nasal bone
Sphenoid bone
Inferior orbital fissure
Middle basal concha
Infraorbital foramen
Maxilla
Aveolar process of maxilla
Aveolar process of mandible
Mandible
Label the skull structures from top to bottom
Frontal bone
Frontal squama
Parietal bone
Supraorbital notch
Squamous suture
Sphenoid bone
Orbit
Ethmoid bone
Palatine bone
Lacrimal bone
zygomaticofacial foramen
Zygomatic bone
Perpendicular plate of ethmoid bone
Inferior nasal concha
Vomer
Mental foramen
