ball-and-socket joint
ball and socket joint
Flexibility is being able to move your arms and legs without pain or tightness.
Flexiblity
I am pretty sure it's called flexibility. Go to this website: http://en.wikipedia.org/wiki/Flexibility_(anatomy)
Gases move freely because there are more spaces between particles of gases.So they can move easily.
Stick puppets are similar to regular puppets but instead of inserting a hand in its opening you place a stick inside it. The arms and legs of stick puppets move about freely.
yes jellyfish are nektons because it move freely any thing that move freely in the ocean is a nekton.
Well, that depends on what state of matter they are in. a solid can move, but cannot move freely as it is bound to one spot by the gravitational forces. water would be able to move freely in a confined space. and gas can move freely as long as there is nothing blocking its path.
they move freely around
Insulators.
mobility
unnone