The Skeletal System Ch 8 Smartbook Assignment (Part 1)

The cranial cavity encloses which of the following?

Brain

How many bones are typically in the adult skeleton?

206

How many bones does the skeleton typically contain at birth?

270

Which part of the maxilla consists of raised portions of bone that lie between the roots of the teeth?

Alveolar process

Match the type of depression with its definition Alveolus Fossa Fovea Sulcus A pit or socket A shallow, broad, or elongated basin A groove for a tendon, nerve, or blood vessel A small pit

Alveolus - A pit or socket Fossa - A shallow, broad, or elongated basin Fovea - A small pit Sulcus - A groove for a tendon, nerve, or blood vessel

Match each cranial fossa with the brain structure(s) that lite within it Anterior Cranial Fossa, Middle Cranial Fossa, Posterior Cranial Fossa Frontal lobes Cerebellum Temporal lobes

Anterior Cranial Fossa - Frontal lobes Middle Cranial Fossa - Cerebellum Posterior Cranial Fossa - Temporal lobes

The region of bone indicated in the figure is the _____________ part of the occipital bone

Basilar

The skullcap that forms the roof and walls of the skull is called which of the following?

Calvaria

Match each anatomical term with its definition Canal, Fissure, Foramen, Sinus A tubular passage or tunnel in a bone A hole through a bone An air-filled space in a bone A slit through a bone

Canal - A tubular passage or tunnel in a bone Fissure - A slit through a bone Foramen - A hole through a bone Sinus - An air-filled space in a bone

Which features are found in the petrous part of the temporal bone?

Carotid canal, Internal acoustic meatus, Jugular foramen

Match each anatomical bone marking with its description Condyle Facet Head A smooth, flat, articular surface A rounded knob that articulates with another bone The prominent expanded end of a bone, sometimes rounded

Condyle - A rounded knob that articulates with another bone Facet - A smooth, flat, articular surface Head - The prominent expanded end of a bone, sometimes rounded

Which term refers to the bony structure that surrounds the brain?

Cranium

Match each type of bone marking with its definition Crest, Epicondyle, Line, Protuberance, Tubercle -A bony outgrowth or protruding part -A small rounded process -An extended region superior to a condlye -A narrow ridge -A slightly raised, elongated ridge

Crest - A narrow ridge Epicondyle - An extended region superior to a condyle Line - A slightly raised, elongated ridge Protuberance - A bony outgrowth or protruding part Tubercle - A small rounded process

Petrous part of temporal bone

Encloses structures of inner ear and auditory ossicles in middle ear internal acoustic meatus, carotid canal, and jugular foramen

The opening indicated in the figure is the _____________ auditory meatus.

External

Which features are found in the tympanic part of the temporal bone?

External acoustic meatus Styloid process

Which of the following is a prominent median projection on the occipital bone?

External occipital protuberance

The ________ bone is indicated by the arrow.

Frontal

Which bone is indicated on the figure?

Frontal

Which bones form the cranium?

Frontal, parietal, occipital, temporal, ethmoid, sphenoid

Which wing of the sphenoid bone forms one half of the middle cranial fossa and a part of the lateral surface of the cranium?

Greater wing

The opening marked on the figure is the ____________ foramen

Infraorbital

Which opening is marked on the figure?

Infraorbital foramen

The opening indicated in the figure is the ___________ foramen.

Jugular

List the sutures surrounding the parietal bones

Lambdoid, Coronal, Squamous, Sagittal

Where does the skull rest on the vertebral column?

Occipital condyles

Which of the following ass resonance to the voice and lighten the anterior portion of the skill?

Paranasal sinuses

Which cranial bones are paired?

Parietal and temporal

Which bone is indicated in the figure?

Parietal bone

Which best describes the cribriform plate?

Perforated bone area that forms the roof of the nasal cavity

What structure sits in the sella turcica?

Pituitary gland

Identify the bony depression indicated in the figure

Sella turcica

Which type of bone forms within a tendon due to stress?

Sesamoid

The foramen magnum is a hole for passage of which of the following?

Spinal cord

List the foramina found in the sphenoid bone

foramen ovale foramen rotundum foramen spinosum foramen lacerum

Which foramina of the sphenoid bone are passage ways for branches of the trigeminal nerve?

foramen rotundum and foramen ovale

What are the paranasal sinuses?

frontal, sphenoid, ethmoid, maxillary

The smooth flat area of the bone marked on the figure is called the ___________.

glabella

The ___________ is an irregular opening for the jugular vein just medial to styloid process.

jugular foramen

The bony feature indicated as "B" is the _________ pterygoid plate.

lateral

squamous part of temporal bone

located inferior to the squamous suture zygomatic process and mandibular fossa

The foramen __________ is a large hole where the spinal cord enters the cranium.

magnum

The opening in the occipital bone through which the spinal cord exits the cranial cavity is the foramen ___________.

magnum

mastoid part of temporal bone

mastoid process, mastoid notch, stylomastoid foramen, mastoid foramen

The bone indicated on the figure is the

maxilla

Another term for a canal through a bone is a(n) _______________.

meatus

Name the scroll-like bones that project into the nasal cavity

nasal conchae

The ridge indicated in the figure is called the superior ____________ line

nuchal

The bony prominence indicated in the figure is the external __________ protuberance

occipital

Which bone forms the back of the skull?

occipital

Identify the bony structure indicated in the figure

occipital condyle

The arrow is pointing to the _____________ bone

parietal

Within the nasal septum, the _____________ plate is part of the ethmoid bone

perpendicular

identify the bony structure indicated in the figure

perpendicular plate (of the ethmoid bone)

The suture between the parietal bones is the __________ suture.

sagittal

The patella is an example of a _______ bone, one that forms within a tendon due to stress.

sesamoid

the inferior nuchal line is an attachment site for

some deep neck muscles

Name the bone indicated on this figure

sphenoid

What structure passes through the foramen magnum?

spinal cord

A sharp, slender, narrow process of a bone is called a _______________

spine

Identify the opening indicated in the figure.

stylomastoid foramen

The hole marked on the figure is called the _____________ foramen

supraorbital

Name the bone indicated in the figure

temporal

The ________ process of the zygomatic bone forms part of the zygomatic arch.

temporal

The __________ lines indicated in the figure are the site of attachment for the temporalis muscle

temporal

The bone indicated in the figure is the __________ bone

temporal

The mandibular condyle articulates with which part of the temporal bone?

the mandibular fossa (of the temporal bone)

The projection of the temporal bone that extends anteriorly to form part of the zygomatic arch is the ________ process

zygomatic

The temporal process of the __________ bone forms part of the zygomatic arch.

zygomatic

The carotid canal is a passageway for the _________

carotid artery

Identify the openings indicated in the figure

carotid canal

The occipital __________ are smooth processes on either side of the foramen magnum that articulate with the atlas.

condyles

The largest cavity in the skull that encloses the brain is the _________ cavity

cranial

the perforated part of the ethmoid bone that forms the roof of the nasal cavity is called the

cribriform

The midline crest in the ethmoid bone that provides an attachment for the dura mater is called the _________ galli

crista

The crista galli is an attachment for

dura mater

The ear canal is also called the __________.

external auditory meatus

tympanic part of temporal bone

external auditory meatus styloid process

Which term refers to a prominent expanded end of a bone that is sometimes rounded?

Head

Which wing of the sphenoid bone forms the posterior margin of the anterior cranial fossa?

Lesser wing

Which term refers to a slightly raised, elongated ridge?

Line

Identify the articular surface indicated in the figure

Mandibular fossa

Identify the bony process indicated in the figure

Mastoid process

What is the prominent bony process behind and below the ear that is filled with small air sinuses and serves as an attachment for a major neck muscle?

Mastoid process

What is the name of the bony feature labeled "A" in this picture?

Medial pterygoid plate

Match the parts of the temporal bone with their descriptions Squamous part - Tympanic part - Mastoid part - Petrous part - Contains the styloid process and a small ring of bone surrounding the external acoustic meatus Flat and vertical part that also contains the zygomatic process Contains the internal acoustic meatus and the middle- and inner-ear cavities Found posterior to the tympanic part and is filled with small air sinuses that communicate with the middle-ear cavity

Squamous part - Flat and vertical part that also contains the zygomatic process Tympanic part - Contains the styloid process and a small ring of bone surrounding the external acoustic meatus Mastoid part - Found posterior to the tympanic part and is filled with small air sinuses that communicate with the middle-ear cavity Petrous part - Contains the internal acoustic meatus and the middle- and inner-ear cavities

Match each temporal bone to its most prominent features Squamous part Tympanic part Mastoid part Petrous part zygomatic process and mandibular fossa external acoustic meatus and styloid process mastoid process and mastoid foramen internal acoustic meatus, carotid canal, and jugular foramen

Squamous part - zygomatic process and mandibular fossa Tympanic part - External acoustic meatus and styloid process Mastoid part - mastoid process and mastoid foramen Petrous part - Internal acoustic meatus, carotid canal, and jugular foramen

Indentify the bony structure indicated in the figure.

Styloid

Which process on the temporal bone provides a site of attachment for muscles of the tongue, pharynx, and hyoid bone?

Styloid process

Which is a passage in the temporal bone for the facial nerve?

Stylomastoid foramen

The __________ foramen is a hole that provides passage for a nerve, artery, and vein above the margin of the eye.

Supraorbital

What is the name of the bony ridge indicated in the figure?

Supraorbital margin

The thickened lines on the side of the skull that provide attachment points for the temporalis muscle are called which of the following?

Temporal lines

The axial skeleton can be defined as which of the following?

The bones of the supporting central axis of the body

Which nasal conchae has sensory cells of smell?

The superior concha

Which features are found in the squamous part of the temporal bone?

Zygomatic process, Mandibular fossa

A tooth socket is a(n) _________

alveolus

What are the names of the cranial fossae?

anterior, middle, and posterior

The upper and lower limbs and the pelvic girdle comprise the ________ skeleton

appendicular

The skull, vertebral column, and rib cage comprise the ____________ skeleton

axial