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Anatomy and Physiology > Bone Anatomy: Axial Skeleton > Flashcards

Bone Anatomy: Axial Skeleton Flashcards

1
Q

Total number of bones in the axial skeleton

A

80 bones

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2
Q

Total number of bones in the skull

A

22 bones [8 acts as the braincase, 14 are facial bones]

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3
Q

Total number of bones in the auditory ossicles

A

6 bones

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4
Q

Total number of bones in the vertebral column

A

22 bones [7 in the cervical vertebrae, 12 in the thoracic vertebrae, 5 in the lumbar vertebrae, the other 2 being the sacrum and the coccyx]

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5
Q

Total bones in the thoracic cage

A

25 bones [24 consists the ribs, the other 1 is the sternum which is comprised of 3 parts]

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6
Q

Alternate name for the braincase or skull

A

Neurocranium

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7
Q

It encloses the cranial cavity; covers and protects the fragile brain tissue

A

Skull, braincase, neurocranium

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8
Q

The parietal and lateral walls of the cranium; coronal suture

A

Parietal bone (paired)

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9
Q

Lies inferior to the parietal bone; squamous suture

A

Temporal bone (paired)

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10
Q

Forehead, bony projections under the eyebrow, part of the eye’s orbit

A

Frontal bone

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11
Q

Inferior and posterior bone of the cranium; lambdoid suture

A

Occipital bone

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12
Q

Butterfly-shaped bone that spans the width of the skull

A

Sphenoid

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13
Q

Irregularly shaped bone that lies anterior to the sphenoid bone

A

Ethmoid

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14
Q

Alternate name for the facial bones

A

Viscerocranium

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15
Q

It consists of 14 bones; 13 solidly connected, 1 movable (mandible). It holds the facial muscles in place. It is joined together by sutures (interlocking, immovable)

A

Facial bones, Viscerocranium

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16
Q

Upper jaw, main bones of the face; carries the upper teeth

A

Maxillae bones (2)

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17
Q

Lies posterior to the palatine provesses of the maxilla

A

Palatine bones (2)

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18
Q

Cheekbones

A

Zygomatic bones (2)

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19
Q

Bones forming part of the medial wall of each orbit

A

Lacrimal bones (2)

20
Q

Bones forming the bridge of the bone

A

Nasal bones (2)

21
Q

Thin curved bones projecting from the lateral wall of the nasal cavity

A

Inferior Nasal Conchae (2)

22
Q

Single jone in the median of the nasal cavity

A

Vomer bone

23
Q

Lower jaw: only freely movable joint of the face

A

Mandible

24
Q

Unpaired, U-shaped bone; not part of the skull & has no direct bong attachment to the skull or any other bones.

Provides attachment to tongue muscles; elevates the larynx during speech and swallowing

A

Hyoid bone

25
Q

form a flexible, bony bridge that transmits vibrations

A

Auditory Ossicles

26
Q

3 parts of the auditory ossicles

A

Malleus (hammer), Incus (anvil), Stapes (stirrup)

27
Q

Central axis of the skeleton, consists of 26 individual bones, has 5 regions

A

Vertebral Column

28
Q

C1-C7, curved anteriorly

very small bodies (except atlas)

A

Cervical vertebrae bones

29
Q

Bone in the cervical vertebrae which hold the head, allows head to move up and down

A

Atlas

30
Q

Bone in the cervical vertebrae that allows for rotation to occur, and lets the head to move left to right

A

Axis

31
Q

T1-T12, curved posteriorly

long, thin spinous processes
extra facets (because of the ribs)
A

Thoracic vertebrae bones

32
Q

L1-L5; curved anteriorly

large, thick bodies & heavy, rectangular transverse & spinous process

A

Lumbar vertebrae bones

33
Q

The other 2 bones in the vertebral column

A

Sacrum (S1-S5) & Coccyx

34
Q

It protects the vital organs within the thorax. It prevents the collapse of the thorax during respiration.

A

Rib cage

35
Q

How many pairs of ribs does a normal person have?

A

12 pairs [1-7 true ribs, 8-12 false ribs, 11-12 floating ribs)

36
Q

Ribs that are attached directly to the sternum

A

True ribs (1-7)

37
Q

Ribs that do not attach directly to the sternum

A

False ribs (8-12)

38
Q

Ribs that do not attach to the sternum

A

Floating ribs (11-12)

39
Q

Breastbone, resembles a sword, is divided into three parts

A

Sternum

40
Q

Three parts of the sternum

A

Manubrium
Body
Xiphoid process

41
Q

A depression bet, the ends of the clavicles where they articulate with the sternum

A

Jugular notch

42
Q

A slight elevation felt at the junction of the manubrium and the sternum; important landmark because it identifies the 2nd rib

A

Sternal angle

43
Q

The most superior part of the sternum and has a trapezoid shaoe

A

Manubrium

44
Q

The largest part of the sternum, its shape is flat and elongated

A

Body of the sternum

45
Q

The smallest and most inferior part of the sternum

A

Xiphoid process

Anatomy and Physiology (3 decks)

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