Synovial Joins Flashcards
(14 cards)
What are synovial joints?
Synovial joints, also known as freely movable joints, allow movement limited by ligaments, muscles, tendons, and adjoining bones.
Where are synovial joints located?
Synovial joints are found at the shoulder, elbow, wrist, fingers, hips, and knees.
How many types of synovial joints exist?
There are six types of synovial joints.
What is a ball and socket joint?
A ball and socket joint has a spherical head of one bone fitting into a cup-like cavity of another bone.
Example: Located at the head of the humerus, allowing a big range of movement in all directions; it is the most mobile joint.
What is a hinge joint?
A hinge joint allows movement in one plane only.
Example: Found between the fingers, at the elbow, and at the knee.
What is a pivot joint?
A pivot joint occurs when the rounded pointed end of one bone articulates with a ring formed partly by bone and partly by ligament.
Example: The joint between the first and second cervical vertebrae (atlas and axis).
What are gliding joints?
Gliding joints allow movement in any direction, side to side or back and forth, but are restricted by ligaments or bony protrusions surrounding the joint.
Example: Found between carpal bones.
What are saddle joints?
Saddle joints occur where both bones are saddle-shaped, concave in one direction and convex in the other, allowing side-to-side and back-and-forth movement.
Example: Found where the thumb joins the hand.
What is a ellipsodial joint?
A condyloid joint is where one bone slightly convex fits into a slightly concave shape in another bone, allowing movement in two directions: back and forth and side to side.
Example: Found between the radius and carpal bones.
Fibrous/fixed joint
No movement, held by fibrous connective tissue, found in sutures of skull
Cartilaginous joint
Held by cartilage, allows for slight movement, found between ribs
What is hyaline cartilage
Closely packed collagen fibres through out matrix
allows cartilage to have strength and flexibility
found where 2 bones meet to stop scraping
What is elastic cartilage
Has elastic fibres and collagen fibres not as packed at hyaline
This allows for flexible elastic support
Found in eat
What is fibrocartilage
Doesn’t have as compacted collagen fibres and therefore can only be compressed slightly
Ideal for regions that bare a lot of weight of the body: areas that need to withstand heavy pressure
Found between intervertebral discs
