objective 11 Flashcards
206 ____ in the body; they are hard, rigid, and very dense; cells in the ____ are continuously remodeling and turning over
bones
where two or more bones come together
joints
immoveable or only slightly moveable, fibrous tissue or cartilage unite the bones
nonsynovial joints
freely moveable, bones are separate from each other and enclosed in a joint cavity that is filled with synovial fluid
synovial joints
covers the surface of opposing bones, cushions the bones, and creates a smooth surface that facilitates movement
cartilage
fibrous bands connecting one bone to another; strengthen the joint, stabilize movement
ligaments
enclosed sac that contains synovial fluid; located in areas of potential friction; help muscles and tendons slide smoothly over bone
bursa
produce movement when they contract
muscles
what are the 3 types of muscles?
skeletal, smooth, cardiac
what is the musculoskeletal system needed for?
support
movements
protection
hematopoiesis
reservoir for storage of essential minerals
Articulation of the mandible and temporal bone
* Palpable in the depression anterior to the tragus
* Enables jaw function for speaking and chewing
temporomandibular joint
what does the temporomandibular joint allow for?
Opening and closing of the jaws (hinge action)
* Protrusion and retraction (gliding action)
* Moving the lower jaw from side to side (gliding action)
what are the connecting bones in the vertical column?
7 cervical
* 12 thoracic
* 5 lumbar
* 5 sacral
* 3-4 coccygeal vertebrae
what are the surface landmarks?
C7 and T1; T7 and T8; L4; sacrum
what does the spines unique structure allow for?
upright posture
flexion, extension, abduction, rotation
what are the 4 curves of the vertebral column?
cervical and lumbar- concave
thoracic and sacrococcygeal- convex
cushion the spine and help it move
intervertebral discs
articulation of the humerus with the glenoid fossa of the scapula; ball and socket allows for greater mobility
glenhumeral joint
consists of muscles and tendons that support and stabilize the glenohumeral joint
rotator cuff
during abduction of the arm it helps the greater tubercle of the humerus moves easily
subacrimial bursa
what are the palpable landmarks of the shoulder joint?
acromian process
greater tubercle
coracoid process
contains 3 bony articulations of the humerus, radius and forearm
flexion and extension
elbow joint
what are the palpable landmarks for the elbow joint?
Medial and lateral epicondyles of the humerus
* Olecranon process of the ulna in between the
epicondyles
articulation of the radius and a row of carpal bones
allows for flexion and extension; side to side deviation
radiocarpal joint
articulation between the two parallel rows of carpal bones
allows for flexion extension, some rotation
midcarpal joint
allow for flexion and extension of the fingers
metacarpophalangeal and interphalangeal joints
articulation between the acetabulum and the head of the femur
hip joint
allows a wide range of motion on many axes
ball and socket
what are the landmarks for the hip joint?
anterior superior iliac spine; ischial tuberosity; greater trochanter
articulation of three bones in one common articular cavity- femur, tibia, patella
largest joint in the body, synovial membrane largest in the body
knee joint
allows for flexion and extension of the lower leg on one plane
hinge joint
2 wedge-shaped cartilages that cushion the tibia and femur
medial and lateral menisci
what is the knee joint stabilized?
cruciate ligaments
collateral ligments
articulation of the tibia, fibula, and talus
ankle joint
allows flexion and extension
hinge joint
what are the landmarks for the ankle joint?
medial malleolus and lateral malleolus