body movement in human

body movements

in human

skeleton

do you remember some of these?

joints

• it is a place where two or more bones meet.

• without joints, our body will not be able to move.

• there are several types of joints ,each producing different amount of movement.

• joins allow flexibilityand the movement of the skeleton and allow attachment between bones.

• muscles are attached to bones by tough tissue called tendons .

types of joints

hinge joint

• hinge joint is very strong ,but allow movement in one plane only .

• it allows movement either up or down or back ward and forward

• example :

ball and socket joint

• ball like surface of one bone fits into a cup like hollow in the either .

• it allows movement in all direction hip and shoulder.

• 
  

pivot joint

• the rounded surface of one bone fits into a ring formed by the either .

• it allows head to turn left and right and also move up and down .

• ex: neck joins the head.

glinding joint

• this allows bones to glide over each other, providing movement in all direction.

• it allows side to side as well as back and forth movement

• ex: wrist and ankles.

MUSCLES

• thin long threads of fibrous tissue that are bundled up togather .

• it is made up of millions of tiny threads of indiviged muscles fibers.

BONES

• it is a hard and almost inflexible structure .

• muscles ,attached to these bones, help them move.

CARTILGE

• the end of bones are coverd with a tough, elastic tissue called cartilage.

• it makes end of bones smooth and reduces friction between the bones during movement

• it is present in upper part of ear and in front of your nose.