Articulations/joints Flashcards
condyle
large, round articulating surface or knob
facet
smooth, flat surface for articulation
head
rounded articulation at the end of a bone
articulations
location at which 2 bones make contact that allow movement and provide mechanical support
periosteum
covers all bones until the joint
fibrous
covers the bones at the joint
synovial membrane
secrets synovial fluid into the joint
synovial fluid
is a thick(egg-like) consistency, stringy liquid. nutrient exchange for cartilage. reduces friction. shock absorbsion
synarthorosis
fibrous joint. non-moveable. ie. skull sutures, gomphosis(teeth)
fibrous joint
no synovial joint cavity
amphiarthrosis
slightly moveable, syndesmosis, fibrocartilaginous
synovial joint
it has a synovial cavity
diarthrosis
moveable, gliding joint, hinge joint, pivot joint, condyloid joint, saddle joint, ball and socket joint
gliding joint
uniaxial, z-joint inter-carpal. planar
hinge joint
uniaxial, a concave surface glides around a convex surface allowing for flexion/extension. ginglymus
pivot joint
uniaxial, rotation around a vertical or long axis is allowed. trochoid
condyloid joint
biaxial; oval articular surface with an elliptical cavity to permit flexion/extension, abduction/adduction, and circumduction but not axial rotation. ellipsoidal
saddle joint
biaxial; both joints have saddle shaped surfaces fitted to each other allowing for F/E Ab/Ad, circumduction. joint of the thumb
ball andsocket joint
poly-axial spheroid ball and sockets allow for all the moves and rotation along its axis. shoulder/hip joints. spheroid
Types of bones
Long bones Short bones Flat bones Irregular bones Sesamoid bones
Long bones
Found in extremities, consists of body or shaft, is cylindrical with central cavity, curved
Short bones
Mainly wrist or ankle, cube-ish shape
Flat bones
Broad flat plats, 2 layers of compact tissue enclosing variable quantity of cancellous tissue
Irregular bones
Have complex shapes cannot be classified
Sesamoid bones
Floating bones that develop in high friction areas around a joint
Cortical
The hard outer shell of bone
Cancellous
The spongy inside of a bone
Bursa
a fluid filled sac to reduce friction between two moving surfaces
Hyaline
the most common type of cartilage
elastic
found in the ear, larynx, nose, trachea
Fibrocartilage
found in areas of high stress