Human anatomy joints and muscles

Circumduction

Around, should, hip joint

Synovial joint

Articulating bones are separated by a fluid containing joint cavity; all joints of limbs, freely movable diarthroses

Bursae

Connective tissue sacs lined with synovial membranes that act as cushions in places where friction develops

Flexion

Decreases angle between articulating bones

Ligament

Dense regular connective tissue connecting BONE TO BONE

Tendon

Dense regular connective tissue connecting MUSCLE TO BONE

Diarthrotic

Freely moveable

Synovial fluid

High hyaluronic acid content, egg white consistency; fluid forced from cartilage when compressed, seeps back into cavity when compression lessened

Synarthrotic

Immovable joints

Arthritis

Inflammation of joints; 100 different types

Elevation

Lifting part superiorly; chewing, shoulder shrug

Sprain

Ligaments torn or stretched

Adduction

Movement toward midline

Abduction

Moving king away from midline or median plane

Strain

Muscle pull

Extension

Reverse of Flexion, increase angle

Joints

Site where two bones meet; give skeleton mobility and hold Skelton together; weakest part of the skeleton

Origin

The end of the muscle that attaches to the stationary bone

Insertion

The end of the muscle that moves

Suture

a fairly rigid joint between two or more hard elements of an organism, with or without significant overlap of the elements

Ball-in-socket

a rounded head fits into a rounded cavity, allowing a wide range of movement

Hinge joint

formed between two or more bones where the bones can only move along one axis to flex or extend

Menisci

is a crescent-shaped fibrocartilaginous structure that, in contrast to articular disks, only partly divides a joint cavity