8.1 classes of joints Flashcards Preview

Bio 364 Lecture Exam 1 > 8.1 classes of joints > Flashcards

Flashcards in 8.1 classes of joints Deck (31):
1

what are the 3 main classes of joints

fibrous
cartilaginous
synovial

2

what is the main way of classifying joints

using a structural (anatomical) to classify based on major CT type and if there is a joint capsule

3

what is another way of classifying joints and what are the classifications?

could use functional classification based on degree of movement:
synarthosis (non-movable)
amphiarthroses (slightly moveable)
diathroses (fully moveable)

4

describe a fibrous joint

no joint capsule
little mvmt

5

what type of joints are sutural joint?

seams btwn bones (as in the interdigitated sutures of the skull)

6

what is the composition of a suture?

periosteium continuous with bone plus dense, regular collagenous connective tissue
this makes up the sutural ligament

7

define synostosis

two bones grow together across a joint to form a single bone

8

give an example of synostosis

frontal bone has a frontal suture in a neonate, but becomes one bone shortly thereafter

9

what are the 3 types of fibrous joints?

suture
syndesmoses
gomphoses

10

define syndesmosis

a type of fibrous joint in which the bones are further apart than in a suture
limited amount of mvt

11

what joins the bones in a syndesmosis?

ligament

12

what is an example of a syndesmosis?

radioulnar and tibiofibular syndesmosis

13

define gomphoses

a type of fibrous joint in which pegs fit into sockets
little to no movement

14

what holds the pegs in the sockets of a gomphoses

bundles of regular collagenous CT

15

what is an example of gomphoses?

root of tooth with the alveolar socket of madible and maxilla (periodontal ligament)

16

define cartilagenous joints

joints joined by hyaline OR fibrocartilage

17

what are the 2 types of cartilagenous joints?

synchondroses
symphases

18

what is the difference btwn synchondroses and symphases?

synchondrosis, joined by hyaline cartilage
sympahsis joined by fibrocartilage

19

define synchondroses

a type of cartilagenous joint joined by hyaline cartilage with little or no mvmt

20

what is an example of a synchondrosis?

epiphyseal plates
sternocostal joint

21

define symphasis

a type of cartilagenous joint jointed by fibrocartilage
with slight movement

22

give an example of symphasis

sympasis pubis, mental syphasis, intervertebral discs, sternal angle (manubrium to sternum)

23

Define synovial joint?

they have a joint capsule with fluid that gives increased mobility

24

what are the parts of a synovial joint?

articular cartilage (on bone ends)
articular disc (sometimes)
meniscus (fibrocartilage pad)
joint cavity
fibrous outer capsule
inner synovial membrane
bursa (fluid filled extension of the synovial membrane, sometimes)

25

draw a synovial joint

do it

26

what does the articular cartilage do in a synovial joint?

provides a smooth surface where the bones meet

27

define articular disc in a synovial joint?

btwn articular cartilages
fibrocartilage pad
circumference attached to the fibrous joint capsule

28

define meniscus

fibrocartilage pad
found in knee and wrist
like an articular disc, but with hole in center
circumference attached to the fibrous joint capsule

29

define joint cavity of synovial joint

fibrous outer capsule
inner synovial membrane
filled with synovial fluid

30

define bursa

fluid filled pocket or sac extension of the synovial membrane
proved a cushion between structures

31

define tendon sheath

a bursa that extends quite a bit away from the joint along a tendon