Skeletal System Flashcards
How many bones is the skeletal system is composed of?
206 bones
The skeletal system can be divided into what?
Bones of axial body and bones of appendicular body
How is a joint formed?
Wherever two or more bones come together
What is formed when two or more bones come together?
Joints
How can joints be classified?
Structurally and Functionally
What can be classified structurally and functionally?
Joints
What are the 3 structural classifications of joints?
Fibrous
Cartilaginous
Synovial
Is fibrous, cartilaginous and synovial structural or functional?
Structural
What type of structural join is united by dense fibrous fascial tissue?
Fibrous
What type of structural joint is united by fibrocartilage?
Cartilaginous joints
What type of structural joints are united by a thin fibrous capsule that is lined internally by a synovial membrane?
Synovial Joint
What fluid is in synovial joint?
Synovial fluid
What are the functional classifications of joints?
Synarthrotic
Amphiarthrotic
Diarthrotic
Is synarthrotic, amphiarthrotic and diarthrotic joints structural or functional?
Functional
What functional joint permits very little motion?
Synarthrotic joints
What functional joints allow limited to moderate motion?
Amphiarthrotic joints
What functional joints allow a great deal of motion?
Diarthrotic joints
What are usually subdivided based on the number of axes around which they allow motion?
Synovial Joints
What are the types of synovial joint?
Uniaxial
Biaxial
Triaxial
Nonaxial
What synovial joint : Uniaxial, Biaxial, Triaxial or Nonaxial?
- Act similar to HINGE of door
- One surface concave ; other spool like
- Flexion and extension allowed in sagittal plane around a mediolateral axis
Uniaxial joint
What synovial joint :
Biaxial
One surface concave, other convex
Convex surface of one one fits into concave surface of the other
Condyloid joint
What synovial joint : Uniaxial, Biaxial, Triaxial or Nonaxial?
Allow only rotation motions in transverse plane around a vertical axis
PIVOT
Uniaxial pivot joints
What synovial joint :
Biaxial
Both bones have convex and concave shape
Convexity of one bone fits into concavity of other and vice versa
Flexion and extension allowed in one plane
Abduction and adduction allowed in second plane
Saddle
What type of synovial joint?
Triaxial joint
Only one major type
One bone shaped like a ball and fits into socket shape of the other bone
Ball and socket joint
What type of synovial joints are hinge and pivot?
ex. elbow and ankle joints
Uniaxial
What type of synovial joints are condyloid and saddle?
ex. wrist and metacarpophalangeal joint
Biaxial
What type of synovial joint is ball and socket?
ex. shoulder and hip
Triaxial
What type of synovial joint permit motion within a plane, but motion is linear gliding and not circular around an axis
Surfaces usually flat or curved
Nonaxial
Uniaxial, Biaxial, Triaxial or Nonaxial?
Hinge, Pivot
Uniaxial
Uniaxial, Biaxial, Triaxial or Nonaxial?
Condyloid, Saddle
Biaxial
Uniaxial, Biaxial, Triaxial or Nonaxial?
Ball and Socket
Triaxial
Uniaxial, Biaxial, Triaxial or Nonaxial?
Gliding
Nonaxial
