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Question 1

What are the primary components of the skeletal system?

Answer 1

Bones of the skeleton, Cartilage, Ligaments, Other connective tissues

Question 2

What is the structure of long bones?

Answer 2

Longer than they are wide, diaphysis as elongated shaft, contains a medullary cavity

Question 3

What are the four classes of bones?

Answer 3

• Long bones
• Short bones
• Flat bones
• Irregular bones

Question 4

What is the difference between compact bone and spongy bone?

Answer 4

Compact bone is dense, appears white and solid, while spongy bone is porous and located internal to compact bone

Question 5

What is red bone marrow also known as?

Answer 5

Myeloid tissue

Question 6

Where is red bone marrow located in children?

Answer 6

In the spongy bone and medullary cavity of long bones

Question 7

What does yellow bone marrow represent?

Answer 7

Product of red bone marrow degeneration, fatty substance

Question 8

What are the three types of cartilage?

Answer 8

• Hyaline cartilage
• Fibrocartilage
• Elastic cartilage

Question 9

What are osteons?

Answer 9

Small cylindrical structures, basic functional and structural unit of mature compact bone

Question 10

What is the function of osteocytes?

Answer 10

Bone cells that control functions such as regulating mineral deposition

Question 11

What is periosteum?

Answer 11

Outer sheath of long bones consisting of an outer fibrous layer and inner cellular layer

Question 12

What is the axial skeleton composed of?

Answer 12

Skull, vertebral column, thoracic cage

Question 13

What are the eight cranial bones?

Answer 13

• Frontal
• Parietal (2)
• Occipital
• Temporal (2)
• Sphenoid
• Ethmoid

Question 14

What is the purpose of sutures in the skull?

Answer 14

Immovable joints between skull bones that allow for growth and flexibility during fetal development

Question 15

What are fontanelles?

Answer 15

Dense connective tissue structures that connect cranial bones in newborns, known as soft spots

Question 16

How many facial bones are there?

Answer 16

14 facial bones

Question 17

What are the paired facial bones?

Answer 17

• Zygomatic
• Lacrimal
• Nasal
• Palatine
• Inferior nasal conchae
• Maxillae

Question 18

What is the function of the nasal cavity?

Answer 18

Creates space inside the nose, plays a role in air filtration, warming, and humidifying

Question 19

What are paranasal sinuses?

Answer 19

Hollow air-filled cavities surrounding nasal cavity that help lighten skull bones and provide resonance to the voice

Question 20

What is the role of the frontal bone?

Answer 20

Forms the forehead and parts of the eye sockets

Question 21

What is the significance of the external occipital protuberance?

Answer 21

Point of attachment for trapezius muscle & nuchal ligament

Question 22

Where do sutural bones form?

Answer 22

Between major skull bones as byproducts of the suturing process

Question 23

What is the calvaria?

Answer 23

The roof of the cranium formed by certain cranial bones

Question 24

What bones contribute to the hard palate?

Answer 24

• Palatine bones
• Maxillary bones

Question 25

What are the features of the sphenoid bone?

Answer 25

Butterfly-shaped bone that helps form the orbit and contains important foramina

Question 26

What is the function of the mandible?

Answer 26

Forms the lower jaw and supports the teeth

Question 27

Fill in the blank: The _______ is an immovable joint between cranial bones.

Answer 27

suture

Question 28

True or False: The sagittal suture usually closes in the late 20s to early 30s.

Answer 28

True

Question 29

What are the internal features of the skull?

Answer 29

* Sphenoid bone * Ethmoid bone * Inferior nasal concha * Palatine bone * Vomer

Question 30

What type of bone is spongy bone associated with?

Answer 30

Trabecular bone

Question 31

What are the two layers of the perichondrium?

Answer 31

* Outer fibrous layer * Inner cellular layer

Question 32

What is the prominence between the eyebrows called?

Answer 32

Glabella ## Footnote The glabella is a smooth area located between the eyebrows, important in facial anatomy.

Question 33

What are the upper edges of the orbits called?

Answer 33

Supraorbital margins ## Footnote The supraorbital margins are larger in males and form the upper boundary of the eye sockets.

Question 34

What is the pathway in the sphenoid bone that carries the optic nerve?

Answer 34

Optic canal ## Footnote The optic canal is a critical structure for vision, allowing the optic nerve to pass from the eye to the brain.

Question 35

What marks the inferior border of the nasal cavity?

Answer 35

Anterior nasal spine ## Footnote The anterior nasal spine is a bony projection that helps define the shape of the nasal cavity.

Question 36

What are the sockets in the maxilla and mandible where teeth articulate with the skull called?

Answer 36

Alveolar processes ## Footnote Alveolar processes are essential for dental health as they hold the roots of the teeth.

Question 37

What is the opening for nerve passage located in the mandible?

Answer 37

Mental foramen ## Footnote The mental foramen allows for the passage of nerves and blood vessels to the chin and lower lip.

Question 38

What is the point of attachment for the mentalis muscle?

Answer 38

Mental protuberance ## Footnote The mental protuberance is a prominent feature of the mandible that supports facial muscles.

Question 39

What are the arcs that serve as attachment points for the temporalis muscle called?

Answer 39

Superior/Inferior temporal lines ## Footnote These lines are important landmarks for muscle attachment in the lateral skull.

Question 40

What is the special suture where the frontal, parietal, temporal, and sphenoid bones meet?

Answer 40

Pterion ## Footnote The pterion is clinically significant due to its proximity to major blood vessels.

Question 41

What is the small passageway from the outer ear to the eardrum called?

Answer 41

External acoustic meatus ## Footnote The external acoustic meatus is crucial for hearing as it channels sound waves to the eardrum.

Question 42

What is the point of attachment for hyoid muscles?

Answer 42

Styloid process ## Footnote The styloid process is a slender pointed piece of bone located just below the ear.

Question 43

What are the openings in the lacrimal bone that allow for tear drainage called?

Answer 43

Lacrimal grooves ## Footnote Lacrimal grooves facilitate the drainage of tears from the eye to the nasal cavity.

Question 44

What is the name of the bony structure that contains the sella turcica?

Answer 44

Sphenoid bone ## Footnote The sphenoid bone houses the sella turcica, which contains the pituitary gland.

Question 45

What is the name of the sinus located within the frontal bone?

Answer 45

Frontal sinus ## Footnote The frontal sinus is involved in reducing the weight of the skull and is lined with mucous membranes.

Question 46

Fill in the blank: The _______ is a large opening at the base of the skull that allows the spinal cord to connect to the brain.

Answer 46

Foramen Magnum ## Footnote The foramen magnum is critical for the passage of the spinal cord and vertebral arteries.

Question 47

True or False: The cribriform plate is part of the ethmoid bone.

Answer 47

True ## Footnote The cribriform plate allows for the passage of olfactory nerves from the nasal cavity to the brain.

Question 48

What are the two parts of the temporal bone that are important for hearing?

Answer 48

Petrous part and Squamous part ## Footnote The petrous part contains structures for hearing, while the squamous part forms the lateral wall of the skull.

Question 49

What is the term for the bony structure that forms the hard palate?

Answer 49

Palatine process of maxilla ## Footnote The palatine process of the maxilla is crucial for separating the oral cavity from the nasal cavity.

Question 50

What is the name of the bone that forms the lower jaw?

Answer 50

Mandible ## Footnote The mandible is the only movable bone of the skull and is essential for mastication.

Question 51

What is the name of the bone that forms the nasal septum?

Answer 51

Vomer ## Footnote The vomer is a thin bone that divides the nasal cavity into left and right sides.

Question 52

What is the significance of the jugular foramen?

Answer 52

It allows passage for cranial nerves and jugular vein ## Footnote The jugular foramen is crucial for venous drainage from the brain.

Question 53

What are the processes of the sphenoid bone that project downwards called?

Answer 53

Pterygoid processes ## Footnote The pterygoid processes are important for the attachment of muscles that move the jaw.

Question 54

Fill in the blank: The _______ is a small opening in the temporal bone that transmits the facial nerve.

Answer 54

Stylomastoid Foramen ## Footnote The stylomastoid foramen is important for the functioning of facial expressions.