Chapter 7: The Axial Skeleton Flashcards

1
Q

Total number of bones in the axial skeleton

A

80

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2
Q

Number of cranial cavity bones

A

8

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3
Q

Hyoid bone

A

Does not articulate with any other bone. In place superior to thyroid membrane.
Considered part of the axial skeleton

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4
Q

Number of facial bones

A

14

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5
Q

Number of auditory ossicles

A

6

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6
Q

Number of bones in the vertebral column

A

26

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7
Q

Number of bones in the thorax

A

24 ribs
1 sternum

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8
Q

Total number of bones in the adult body

A

206

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9
Q

2 major types of surface markings on bones

A

Depressions and openings
Processes.

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10
Q

Fissure

A

Narrow slit between adjacent parts of bones. Allows vessels or nerves passage

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11
Q

Foramen

A

Opening through which blood vessels, nerves, or ligaments pass

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12
Q

Fossa

A

A shallow depression

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13
Q

Sulcus

A

Furrow along a bone that accommodates vessels, nerves, or tendons.

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14
Q

Meatus

A

A tubelike opening.

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15
Q

Condyle

A

A process. Large, round protuberance with a smooth Articular surface at the end of bone.

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16
Q

Facet

A

Process. Smooth, flat, slightly concave or convex Articular surface.

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17
Q

Head

A

Process. Usually a rounded Articular projection supported by the neck.

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18
Q

Crest

A

Process. Prominent ridge or elongated projection

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19
Q

Epicondyle

A

Process. Tissue attachment. Typically roughened projection above a condyle.

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20
Q

Line

A

Process. Long, narrow ridge or border (less prominent than crest)

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21
Q

Spinous process

A

Process. Sharp, slender projection

22
Q

Trochanter

A

Process. Very large projection

23
Q

Tubercle

A

Process. Variable sized rounded projection.

24
Q

Tuberosity

A

Process. Variably sized projection that has a rough, bumpy surface.

25
Q

Bones of the cranial cavity

A

1x frontal bone, 2x parietal bone, 2x temporal bone, 1x occipital bone, sphenoid bone, ethmoid bone.

26
Q

Facial bones of the skull

A

2x nasal bone, 2x maxillae, 2x zygomatic bone, mandible, 2x lacrimal bone, 2x palatine bone, 2x inferior nasal concha, vomer.

27
Q

Sutures of the skull

A

Coronal suture
Sagittal suture
Squamous suture
Lamboid suture

28
Q

Bones of the orbit

A

Frontal
Sphenoid
Ethmoid
Palatine
Zygomatic
Lacrimal
Maxilla

29
Q

Carotid canal

A

Petrous portion of temporal bone. Internal carotid artery and SNS nerves for eye pass through.

30
Q

Hypoglossal canal

A

Superior to base of occipital condyles.
CNXII, branch of ascending pharyngeal blood vessel

31
Q

Infraorbital

A

Inferior to orbit in maxilla.
Infraorbital nerve and blood vessels, maxillary branch of CNV

32
Q

Jugular

A

Posterior to carotid canal, between temporal and occipital bones.
Internal jugular vein, CNIX, X, and XI

33
Q

Lacerum

A

Sphenoid, temporal, and occipital.
Branch of ascending pharyngeal artery.

34
Q

Foramen Magnum

A

Occipital bone
Medulla and it’s meninges, CNXI, vertebral and spinal arteries.

35
Q

Mandibular foramen

A

Ramus of mandible
Inferior alveolar nerve and blood vessels.

36
Q

Mastoid foramen

A

Posterior border of mastoid process of temporal bone.
Emissary vein to transverse sinus, branch of occipital artery to dura mater.

37
Q

Mental foramen

A

Mandible
Mental nerve and vessels.

38
Q

Cribriform foramen

A

Ethmoid bone.
CNI

39
Q

Optic canal

A

Between portions of small wing of sphenoid.
CNII, ophthalmic blood vessels.

40
Q

Foramen ovale

A

Greater wing of sphenoid.
Mandibular division of CNV

41
Q

Foramen rotundum

A

Junction or anterior and medial parts of sphenoid.
Maxillary division of CNV

42
Q

Stylomastoid foramen

A

Between stylus and mastoid process of temporal.
CNVII, stylomastoid blood vessels.

43
Q

Supraorbital foramen

A

Supraorbital margin of orbit.
Supraorbital nerve and blood vessels.

44
Q

Skull bones containing paranasal sinuses

A

Frontal
Sphenoid
Ethmoid
Maxillae

45
Q

Fontanelles

A

Anterior
Posterior
Anterolateral
Posterolateral

46
Q

Distribution of adult vertebrae

A

7 cervical
12 thoracic
5 lumbar
1 sacrum (5 fused vertebrae)
1 coccyx (4 fused vertebrae)

47
Q

Vertebral sections containing primary curves

A

Thoracic
Sacral

48
Q

Vertebral sections containing secondary curves

A

Cervical
Lumbar.

49
Q

Sections of the sternum from superior to inferior

A

Manubrium
Body
Xiphoid process.

50
Q

Vertebrosternal ribs

A

Ribs 1-7. True ribs. Have costal cartilage that attach directly to sternum via sternocostal joints.

51
Q

Vertebrochondral ribs

A

Ribs 8-10. False ribs. Cartilage attaches to the cartilage of true ribs.

52
Q

Vertebral ribs

A

Ribs 11 and 12. False ribs. Considered floating ribs because they do not attach to the sternum.