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Chapter 7 Bones, Part 1: The Axial Skeleton
Mississippi State Anatomy Test 2; Dr. James Stewart- Fall 2012
How many bones are in the human body?
Bones, Cartilages, Joints or Articulations, Ligaments
The skeleton consists of... (4 different things)
connect 2 bones
joints or articulations
junctions between skeletal elements
Axial and Appendicular skeleton
The skeleton is divided in to these two systems...
forms long axis the body
skull, vertebral column, and thoracic cage
the axial skeleton consists of these three groups of bones...
This system is the appendages of the body
upper limbs (arms), pectoral girdle (shoulder), lower limbs (legs), and pelvic girdle
The appendicular skeleton consists of...
cranial and facial bones
The skull consists of...
encloses the cranial cavity, which supports and protects the brain
These serve as attachment sites for some head and neck muscles
Facial bones are the __________ aspect of the skull
forms framework of the face, forms cavities for sense organs of sight, taste and smell, provides openings for passage of air and food, hold the teeth, and anchor the muscles of the face
interlocking, immovable joints
Most skull bones are _______ and united by _______.
This houses the brain
middle and inner ear, nasal cavity, orbits and sinuses
Smaller cavities in the cranium house which 5 structures?
foramina, canals, and fissures
3 different kinds of openings in the cranium
spinal cord, blood vessels, twelve cranial nerves: I-XII
Openings in the cranium are for these structures...
cranial bone the forms the forehead and roof of orbits
parietal bones (paired)
cranial bones that form the superior and lateral skull
cranial bone that forms the back of the head and foramen magnum
temporal bones (paired)
cranial bones that form the temples
cranial bone that spans base of cranial floor and batwings
cranial bone that is between nasal cavity and orbits
6 bones of the cranium
sphenoid, occipital, temporal, parietal, frontal, ethmoid bone(s)
appearance of sutures on the skull
coronal, sagittal, squamous, and lambdoid
Four largest sutures of the skull
Suture where parietal bone meets frontal bone.
Suture where left and right parietal bones meet.
Suture where parietal and temporal bones meet.
Suture where parietal and occipital bones meet.
These are where bones articulate with parietal bones.
also called "calvaria" or skull cap; this forms superior, lateral, and posterior aspects of the skull and forehead
Base or floor
inferior part of cranium
Prominent bony ridges divides the...
Anterior, Middle, and Posterior
The three "fossae" (steps) of the cranium.
how many different regions does the temporal bone have?
spans the width of the cranial floor
Central Body, Greater Wings, Lesser Wings, Pterygoid
Four parts of the Sphenoid bone.
optic canal, superior orbital fissure, foramen rotundum and foramen ovale, foramen spinosum
The five openings in the sphenoid bone.
Superior orbital fissure
Opening in the sphenoid bone that allows cranial nerves for eye movement to pass through.
foramen rotudum and foramen ovale
Opening in the sphenoid bone that allows cranial nerves for maxillary and mandibular nerves to pass through.
Opening in sphenoid bone that allows the menigeal artery for the parietal and temporal bones to pass through
The thin walled and delicate bone that is deeply located. It forms the medial bony area between nasal cavity and orbits.
This structure separates the 2 cribiform plates
Part of the ethmoid bone that is sieve-like. It secures the brain to the cranial cavity.
Ethmoid Sinuses and Nasal Conchae
These are structures of the ethmoid bone and form the nasal cavities.
This is the medial wall of orbits that is a part of the ethmoid bone
These 8 bones are collectively called __________: mandible, maxillae, zygomatics, nasal, lacrimal, palatines, vomer, and inferior nasal conchae
The lower jaw bone; also the largest and strongest bone in the face.
The upper jaw bone and central part of facial skeleton.
The cheek bones.
The bone that forms the bridge of the nose.
This bone has a fossa that contains the lacrimal sac.
These bones form the hard palate.
The bone forms the inferior part of the nasal septum.
Horizontal Body of Mandible
The jawline of the mandible that anchors lower teeth.
Tooth sockets on the mandible are also called....
Part of the mandible that is the chin.
where the temporalis muscle attaches to the mandible
This part of the mandible is attached to the temporal bone.
Coronoid process, mandibular condyle, and mandibular notch
Name the attachment site of the mandible (3).
The maxilla articulates with all other bones in the face, except the ___________.
This process articulates with the anterior region of the hard palate (the bony roof of the mouth)
These processes articulate with the bridge of the nose.
These sinuses articulate with the paranasal sinuses
This process articulates with the zygomatic bone
Inferior orbital fissure
This fissure articulates with the floor of orbit.
This part of the mandible articulates with the teeth.
bone and cartilage
The nasal cavity is constructed of bone and cartilage.
Ethmoid's cribiform plate
This makes up the roof of the nasal cavity.
Floor of nasal cavity/roof of mouth/hard palate
The palatine processes of the maxillae and horizontal plates of palatine bones make up the ______________.
means "passage"... example: the grooves formed by the chonche
Swirling air through the _________ heats and moistens air; also, mucus filters through this.
Cone-shaped bony cavities; These hold the eyes, muscles that move the eye, some fat and tear-producing glands, and the optic canal.
The optic nerve passes through the ____________.
How many bones form the orbit of the eye?
Air-filled sacs in the bones
Sinuses that cluster around and connect to the nasal cavity at meatus inferior.
These sinuses are extensions of the nasal cavity and are lined by same mucous membrane and have same function.
This is the U-shaped bone that does not articulate with any other bone.
The hyoid bone lies _______ to the mandible.
greater horn, lesser horn, and body
Name the 3 parts that form the hyoid bone.
This is a movable base for the tongue and a point of attachment for the neck muscles that raise and lower the larynx during swallowing.
skull to pelvis
The vertebral column extends from the _____ to the _______.
The vertebral column transmits weight of truck to ______ ________.
This is a curved and flexible structure that protects the spinal cord.
The ribs and muscles of the neck and back attach to the __________ ________.
How many separate bones or vertebrae does a fetus or infant have?
24 (26 in all)
How many vertebrae bones does an adult have? excluding the sacrum and coccyx
sacrum and coccyx
The 9 extra vertebrae in infants fuse together to form the ______ and _______.
As vertebrae go down, the bones _______ in size.
cervical and lumbar curvatures are ______.