Lab Exam Two: Axial Skeleton Flashcards
What are the three types of cartilages?
- hyaline
- elastic
- fibrocartilage
Cartilage that provides support with flexibility and resilience:
hyaline
What are the two types of hyaline cartilage? Where can they be found?
- articular– cover ends of most bones at movable joints
2. costal– connect the ribs to the sternum
Elastic cartilage is better for […]. Examples are the […] and the […].
repeated bending; external ear; epiglottis
Fibrocartilage: […] with […] strength (bundles of […]). Examples of fibrocartilage are the […] and […]
compressible; tensile; collage; menisci; intervertebral discs
What are the 7 functions of the bone?
- support
- protection
- anchorage
- mineral and growth factor storage
- blood cell formation
- fat storage
- hormone production
Long bone structure:
diaphysis (shaft) with epiphysis heads at each end, articular cartilage (hyaline) at joint surface
Periosteum:
collagen sheath that covers the bone
Endosteum:
reticular connective tissue that lines the spongy bone
Epiphyseal plate/line:
hyaline cartilage zone where bones grow in length
Distinguish the bone cells and their functions:
- Osteogenic:
- Osteoblast:
- Osteocyte:
- Osteoclast:
DESCRIPTION
B. found in large numbers
C. found in compact bone in lucuna
D. multi nucleate and ruffled border
FUNCTION
A. stem cell that typically creates all other bone cells; develops into osteoblast
B. forms bone tissue
C. maintains bone tissue
D. resorption/destruction of bone matrix
When there are high calcium levels within the blood, what organ is triggered?
thyroid
When the are low calcium levels within the blood, what organ is triggered?
parathyroid
Calcitonin:
stores Ca ions when there’s a buildup of bone by osteoblasts
What does the parathyroid do for calcium blood levels?
gets calcium ions from bones using osteoclasts
How many bones compose the skull?
22
Diploe:
name of spongy bone IN FLAT BONES ONLY
List the paranasal sinuses:
frontal, sphenoid, ethmoid, maxillary
Where do you find the glabella?
frontal bone– just above the root of the nose
Where do you find the supraorbital mrgin?
frontal bone– ridge deep to the eyebrows
**some people have a supraorbital notch
Name the 4 sutures:
coronal, saggital. squamous, lambdoid
The temporal bone is typically divided into what 4 parts?
- squamous
- tympanic
- mastoid
- petrous
Temporal– What is within the squamous part?
- zygomatic process
2. mandibular fossa/depression
Temporal– What is the tympanic part composed of?
- borders external acoustic meatus
2. opening into the ear canal
Temporal– What is within the mastoid part?
- mastoid process
Mastoid process: filled with small […] that communicate with the […].
air sinuses; middle ear
Temporal– What is within the petrous part?
- internal acoustic meauts
- carotid canal
- jugular foramen
Temporal– Petrous function:
separates the middle cranial fossa from the posterior fossa
Internal acoustic meatus: allows passage of the […] nerve (for […] and […]) from the inner ear to the […].
vestibulocochlear; balance; hearing; brain
Jugular foramen: internal jugular […] of the […], glossopharyngeal, […], and accessory nerves.
vein; neck; vagus
Where is the foramen magnum? What does it contain?
occipital bone
- occipital condyle (head rests on column)
- hypoglossal canal (muscle of tongue)
Superior nuchal line:
- defines superior limit of the neck
2. provides attachment to the skull for neck and back muscles
What 3 things does the sphenoid bone contain?
- pair of sphenoid sinuses
- sella turcica
- foramen: rotundum and ovale
Sphenoid– What is the sella turcica?
contains the pituitary gland
Shenoid– The two foramen (rotundum and ovale) are passages for what?
two branches of the trigeminal nerve
Ethmoid bone is an anterior […] bone located between the […].
cranial; eyes
What are the 3 major portions of the ethmoid bone?
- vertical perpendicular plate
- horizontal cribriform plate
- labyrinth
Ethmoid– What is within the cribiform plate?
- crista galli (dura mater attachment)
2. cribriform (olfactory) formina
Ethmoid– What is the labyrinth?
a large mass on each side of the perpendicular plate
What foramen is found within the maxillae? What does it provide?
infraorbital foramen
provides blood vessel and nerve (nose and cheek)
Where can the palate be found? What is its function?
maxillae
forms the roof of the mouth AND floor of the nasal cavity (separation)
** hard palate anteriorly and soft plate posteriorly
Zygomatic arch contains:
union of zygomatic, temporal, and maxilla bones
Strongest bone in the skull:
mandible
How many bones in each region of the vertebral column?
cervical = 7 thoracic = 12 lumbar = 5 sacrum = 5 fused coccyx = 4 fused
When two vertebrae are joined, they exhibit an opening between their pedicles called […]. These are […] that connect with the spinal cord.
intervertebral foramen; spinal nerves
The atlas […] the head while the axis […] the head.
supports; allows rotation
Cervical vertebrae contain a prominent anterior knob called:
dens
The hyoid bone is a […] shaped bone that lies above the […] cartilage. It is anchored by […] only.
U; thyroid; ligaments
What bones fused to create the sternum?
- manubrium
- body
- xiphoid process
How many ribs in total? Which are true, false, and floating?
12 pairs in total
1-7 are true
8-12 are false with last two being floating ribs