Please help improve this article by adding citations to reliable sources. ... A
hydrostatic skeleton or hydroskeleton is a structure found in many ectothermic ...
Some examples are soft bodied anima...
Zoologists generally recognize three types of skeletons: a hydroskeleton, an
exoskeleton, ... skeleton, occurs in many soft-bodied animals, such as
earthworms. ... Animals with exoskeletons of two or more pieces can generally
move the parts ...
The earthworm is composed of a mucous-like... ... Watch, the earthworm does not
have a backbone and therefore has no skeleton. ... of a mucous-like epidermis
and various segments that help define its structure. ... How does an earthworm
move? ... Earthworm Anatomy · Raising Earthworms · Types of Worms · Leeches
The most famous type of annelid is the beloved earthworm, although several
other ... These cavities are divided by wall-like structures called septa, which help
to ... cavities act like a kind of skeleton, against which muscles can brace to move
antagonistic muscles act on the skeleton to move the body. 50.3 Muscle
contraction ... There are three types of skeletal systems in the animal kingdom:
Earthworms help to create a soil environment that is livable for many
underground critters. ... This distinguishes them from other types of worms which
may be flat or without rings. ... By contracting these two sets of muscles
alternately, in different parts of the body, the worm is able to move. ... Does the
worm have a skeleton?
Earthworms A earthworm does not have a skeleton. It has bristles on each
segment called setae that help the earthworm move. Earthworms have no limbs.
Types of Skeletal Systems | Functions of Muscles and Bones ... animals had their
weight supported by water and were able to move by cilia or other simple
organelles. ... Bone also helps regulate blood calcium levels, serving as a
The two basic types of skeleton found among animals are the exoskeleton and
the... ... and a number of small, land-dwelling invertebrates such as earthworms
and .... Animals with hydrostatic skeletons move using the combined actions of
Earthworms move through small spaces. ... This type of skeleton, where muscle
forces are applied to internal compartments of fluid under pressure, is called a ...