Name three animals that have endoskeleton.
Cow, horse, person,...
Name three animals that have exoskeletons.
Lobsters, spider, snail.
What is the function of the skeletal system ?
Hold up the body, keep body shape and form, protect lungs and heart.
What are organs of skeletal system ?
Joint, bones.
What is hydrostatic ?
Skeletons made of fluid tubes surrounded by muscles.