Module 7: The Skeleton and Joints Flashcards

1
Q

Axial Skeleton

A
80 Bones
Skull
Vertebrae
Ribs
Hyoid bone
Sternum
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2
Q

Appendicular Skeleton

A

126 Bones
Upper and lower extremities
Pelvic girdle
Pectoral girdle

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3
Q

Skull (cranial bones)

A
1 frontal (forehead)
2 parietal (top and sides of skull)
2 temporal (temple region)
1 occipital (rear of skull)
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4
Q

Skull (facial bones)

A
2 nasal
2 maxillae (upper lip)
1 mandible (jaw)
2 zygomatic (cheek bones)
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5
Q

Hyoid Bone

A

Only bone in body that does not join with any other bone

Purpose is to provide a movable base for the tongue

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6
Q

Ear Bones

A

2 malleus - hammer
2 incus - anvil
2 stapes - stirrup

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7
Q

Vertebrae

A
7 cervical (C1-C7)
12 Thoracic (T1-T12)
5 Lumbar (L1-L5)
5 fused sacral bones (sacrum)
4 fused coccygeal bones (coccyx/tailbone)
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8
Q

Sternum

A

consists of manubrium, body, and xiphoid process

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9
Q

Ribs

A

24 (12 pairs)

Each pair articulate with one of the 12 thoracic vertebrae

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10
Q

Pectoral Girdle (shoulder girdle)

A

Scapula and clavicle

Attaches upper extremities to axial skeleton

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11
Q

Pelvic Girdle (hip)

A

2 hipbones unite anteriorly at the pubic symphysis; and posteriorly at the sacrum
Hipbone formed of ilium, pubis and ischium
Provides strong and stable support for lower extremities

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12
Q

Upper extremities

A
Humerus (upper arm)
Radius (lower lateral arm)
Ulna (lower medial arm)
Carpals (8 wrist bones)
Metacarpals (5 hand bones)
Phalanges (14 fingers bones)
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13
Q

Lower extremities

A
Femur (upper leg bone)
Patella (kneecap)
Tibia (lower medial leg bone/shin)
Fibula (lower lateral leg bone)
Tarsals (7 ankle bones)
Metetarsals (5 foot bones)
Phalanges (14 toe bones)
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14
Q

Fibrous joints

A
Structural classification
Fibrous tissue
No joint cavity between bones
Suture Joints most common
Syndesmoses and gomphoses are 2 other types
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15
Q

Cartilaginous Joints

A

Structural classification
Bones joined by cartilage
No joint cavity
Synchondroses and symphyses are 2 types

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16
Q

Synovial joints

A

Structural classification
bones separated by a fluid-containing cavity
Most joints are this kind

17
Q

Synarthrosis

A

Functional classification of joints
Immovable joint
Held together by dense fibrous connective tissue

18
Q

Amphiarthrosis

A

Functional classification of joints
Slightly movable joint
Separated by cartilage

19
Q

Diathrosis (synovial joints)

A

Functional classification of joints
Freely moveable joine
Most joints are this type

20
Q

4 things synovial joints consist of

A
Articular cartilage (surface of each end of the joining bones)
Joint Capsule (fibrous connective tissue encloses the joint in a strong sleeve-like covering)
Synovial Membrane (line Inner surfaces of joint cavity, secretes synovial fluid into cavity)
Synovial Fluid (eases friction)
21
Q

Types of synovial joints (6)

A
Plane (wrist, ankle bones)
Hinge (elbow, fingers, toes)
Pivot (proximal radioulnar joints)
Condyloid (metacarpophalangeal joints/knuckles)
Saddle (carpometacarpal joint of thumb)
Ball and socket (shoulder, hip)
22
Q

Flexion

A

type of synovial joint movement

Bending of a joint that decreases the angle

23
Q

Extension

A

type of synovial joint movement

Straightening of a joint that increases angle

24
Q

Plantar flexion

A

type of synovial joint movement

Pointing your toe

25
Q

Dorsiflexion

A

type of synovial joint movement

Lifting your foot towards your leg

26
Q

Hyperextension

A

type of synovial joint movement

Overextending a joint beyond normal straightened position

27
Q

Abduction

A

type of synovial joint movement

Movement away from midline of body

28
Q

Adduction

A

type of synovial joint movement

Movement towards the midline of the body

29
Q

Inversion

A

type of synovial joint movement

Turning sole of foot inward so that it faces the opposite foot

30
Q

Eversion

A

type of synovial joint movement

Turning the sole of your for outwards, away from your body

31
Q

Supination

A

type of synovial joint movement

Turning your hand so that the palm faces upward

32
Q

Pronation

A

type of synovial joint movement

Turning your hand so that the palm faces downward

33
Q

Circumduction

A

type of synovial joint movement

Combination of movements