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Terms in this set (125)
That portion of the skull that encloses the cranial cavity and protects the brain
Comprises the frontal, parietal, temporal, occipital, sphenoid, and ethmoid bones.
the brain is separated from the cranium by 3 membranes called"
Cranium consists of 2 parts
calvaria (dome) and cranial base
The cranial base has 3 depressions called ____ which consist of 1__, 2___ and 3___
- anterior cranial fossa
- middle cranial fossa
- posterior cranial fossa
How many cranial bones are there?
8. Ethmoid, sphenoid, frontal, parietal (2), temporal (2), occipital
Identify two reasons why the number of bones vary with age.
Some bones fuse together with age.
Sesamoid bones form within tendons in response to stress.
Sutural or wormian bones are extra bones located within the ______.
Name the two regions of the skeleton.
A bone may exhibit a variety of ridges, spines, bumps, depressions, canals, pores, slits, cavities, and articular surfaces called _____.
A tubular passage or tunnel through a bone is a
Identify the term for a bone marking that is a slightly raised, elongated ridge.
is a projection superior to a condyle.
Identify the term for a bone marking that is an opening into a canal.
A hole through a bone is termed a
A slit through a bone is termed a
Any bony prominence is called a
A bony outgrowth or protruding part of a bone is called a
Identify the term for a bone marking that is a tubular passage or tunnel through a bone.
Identify the term for a bone marking that is a space or cavity.
refers to a pit or pocket
NOT a cavity/space like sinus
A sharp, slender, or narrow process is called a
groove for a tendon, nerve, or blood vessel.
A smooth, rounded articular process (ROUNDED KNOB)
-articulates with another bone
A small, rounded process is called a
(small rounded process that allows for attachment of tendons or ligaments)
narrow ridges on a bone
smooth, nearly flat articular surface
A smooth, flat, slightly concave or convex articular surface
Identify the term for a shallow, broad, or elongated basin.
A round hole through a bone that allows passage for nerves and blood vessels is called a _____.
NOT canal bc it is a passageway through bone
Cranium consists of 2 major parts
The region of the skull bones that forms the dome of the top of the head (also called the skullcap) is called the
The relatively shallow, crescent-shaped basin that forms the floor of the cranium and accommodates the frontal lobe is called the _____ ____ fossa
The cranial cavity consists of 3 depressions
1. anterior cranial fossa (moon/floor holds frontal lobe)
2. middle cranial fossa (shaped like birds wings for temporal lobes)
3. posterior cranial fossa (deepest and for cerebellum)
How many cranial bones are found in the skull?
Collectively, the bones of the skull that enclose the brain are called the
Name the smooth area of the frontal bone just above the nose.
- slight thickenings that form an arc across the parietal and front bones for attachment of the temporalis muscle
- mark the attachment of large, fan-shaped temporalis muscle, a chewing muscle that converges on the mandible
maxillary is not part of ____ bones
Identify the sutures of the parietal bones.
separates the temporal bones from the occipital bone
Between parietal and temporal bones
Name the structure that sometimes occurs near the corner of the lambdoid and sagittal sutures
parietal foramen (holes on each parietal)
he relatively flat and vertical portion of the temporal bone is called the ___ part
The part of the temporal bone that borders the external acoustic meatus and contains the styloid process is the ___ process
The prominent bony process posterior and inferior to the ear that is filled with small air sinuses and serves as an attachment for a major neck muscle is the ____ process
The lateral walls and part of the floor of the cranial cavity are formed by the _____ bones.
The part of the temporal bone that is found posterior to the ear and contains the mastoid process is the ___ part
The internal acoustic meatus is ______.
an opening for the vestibulocochlear nerve.
The pituitary gland sits in a saddle-like surface of the sphenoid bone called the ____ ____
The bone that is located between the eyes and helps to form the medial wall of orbit, roof and walls of the nasal cavity and nasal septum is the _____ bone?
The optic canals are located on the ______ wing of the sphenoid bone.
superior nasal conchae
middle nasal conchae
The hypophyseal fossa is associated with the ______ bone and it houses the ______.
sphenoid, pituitary gland
The thin median plate of bone that forms the superior two-thirds of the nasal septum is called the ___ plate
The crista galli provides an attachment for the _____.
meninges (or dura mater which is the outermost layer of the meninges)
The part of the ethmoid bone that is perforated and forms the roof of the nasal cavity is the ___ plate
The numerous small holes in the cribriform plate are called _____ (or cribriform) foramina.
The large mass on each side of the perpendicular plate that internally consists of a maze of air spaces called ethmoidal cells is _____.
The midline vertical crest in the anterior cranial fossa of the ethmoid bone that provides an attachment for the meninges is called the _____.
is a saddle like prominence of the sphenoid bone
Which best describes the cribriform plate?
Perforated bone area that forms the roof of the nasal cavity.
The numerous small olfactory (or cribriform) foramina are found on the _____.
Using the picture of bones of the orbit, identify the structure indicated by the arrow.
The term that describes a deep tooth socket is a(n)
The bones that function to support the teeth, give shape to the face, and provide attachment for facial muscles are collectively called the ___ bones
The roof of the mouth consists of an anterior bony ______ palate and a posterior fleshy ______ palate.
In this inferior view of the skull, the structure indicated by arrow is the ___ foramen
The condition called cleft lip/cleft palate is due to the failure of the ______ processes of the ______ bones to join during fetal development.
The bones that form the posterior portion of the hard palate, part of the wall of the nasal cavity and part of the orbit are the _____ bones.
The bone that forms most of the hard palate is the _____ bone.
The portion of the zygomatic bone that forms part of the zygomatic arch is the _____ process.
Describe the location of the palatine bones.
Posterior nasal cavity
The bones that form the bridge of the nose and support the cartilage that forms the lower portion are the ___ bones
The two structures that form the zygomatic arch are the ______.
zygomatic process of the temporal bone
temporal process of the zygomatic bone
Which of the nasal conchae in the nasal cavity is the largest?
Inferior nasal conchae
The superior portion of the nasal septum is formed by the _____ and the inferior portion is formed by the _____.
ethmoid bone, vomer
The bones located between the nasal and ethmoid bones that form part of the medial wall of each orbit are the ____ bones
inferior nasal conchae
The structure indicated in the figure by the arrow is the _____.
The foramen on the mandible that allow entry for nerves and blood vessels into the mandibular body are the _____ foramen.
The name of the bones given to the malleus, incus, and stapes are the auditory
The mandibular condyle meets with the temporal bone to form the ______ joint.
The slender U-shaped bone between the chin and larynx is the _____ bone.
The vertebral column (spine) consists of _____ vertebrae with intervertebral discs of fibrocartilage between most of them.
There are 7 cervical, 12 thoracic, 5 lumbar, 5 sacral, and 4 coccygeal vertebrae.
Name the three auditory ossicles.
The temporomandibular joint is formed by the mandibular ____ of the mandible and the mandibular _____ of the temporal bone.
Describe the advantage of having the skull balanced on the center of the vertebral column.
The head is less likely to tip forward
What are the functions of the vertebral column?
Allows for movement of the skull and trunk
Protects the spinal cord
Supports the skull and trunk
The weight bearing portion of the vertebra is the _____.
body or centrum
Names of vertebral curvatures
The opening between the pedicles of two successive vertebrae that allows for the passage of spinal nerves (shown in the figure) is a(n) ____ foramen
Within the vertebral column, a cartilagenous pad consisting of an inner gelantinous nucleus surrounded by a ring of fibrocartilage is called the ___ disc
Within a vertebra, the triangular canal posterior to the body of the vertebra is called a
There are _____ intervertebral discs.
The spaces in all cervical vertebrae that provide passage for the vertebral arteries are the _____ foramen.
articulation between the atlas and the cranium
articulation between the atlas and axis
The atlanto-occipital joint produces what type of movement?
Nodding "yes" type movement
The Atlanto-axial joint produces what type of movement?
Rotation of skull in "no" type movement
The axis (C2), has a distinctive and prominent anterior knob called the _____.
Transverse costal facets on vertebrae T1 through T10 are located _____.
on the transverse processes
The feature that is unique to the body of the thoracic vertebrae are the
Transverse costal facets on vertebrae T1 through T10 are points of articulation for _____.
The sacrum is typically fused into a single bony plate at approximately age _____.
The fusion of the transverse processes of the sacral vertebrae form the ___ sacral crest
What is the opening at the end of the sacral canal?
The rough, ear-shaped surface on each side of the sacrum that articulates with the ilium is the _____ surface.
L5 articulates with the sacrum at the _____ of the sacrum.
superior articular process
The fused vertebrae that form the posterior wall of the pelvic cavity form the bone plate called the
The small triangular bone made up of four or five small fused vertebrae is the
The strong, immovable joint between the auricular surface of the sacrum and the hip bone is the _____ joint.
The bone that forms the posterior wall of the pelvic cavity is the
The rib structure that articulates with the body of a thoracic vertebrae is the _____.
The tubercle is the point of attachment to the transverse process of the vertebra, not the body.
Ribs that have their own costal cartilage connection to the sternum are called _____ ribs.
The manubrium joins the body of the sternum at the _____.
The ribs that do not have cartilagenous connections to the sternum are the _____ ribs.
The rib structure that attaches to the transverse costal facet of a thoracic vertebra is the _____.
The two-steps in the process of endochondral ossification are ______.
Name the fontanels.
Anterior (future Coronal Suture)
Posterior (future Lambdoid Suture)
The sternum begins to develop as a pair of longitudinal strips of mesenchyme called the _____.
The segments of embryonic mesoderm on each side of the notocord and neural tube are called _____.
A linear fracture in the facial bones is a _____ fracutre.
The ribs begin to undergo endochondral ossification at approximately _____ weeks of gestational age.
When is ossification of the sternum completed?
shortly after birth
A Le Fort fracture is from damage to the _____ bones.
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