They have a type of skeleton called a hydrostatic skeleton. This type of skeleton is a fluid filled sac which is surrounded by muscles.
a hydrostatic skeleton
Yes, there is fluid pressure in the skeleton. However, fluid pressure is only in the exoskeleton, not the internal skeleton.
A grasshopper's skeleton is external and is called an exoskeleton. It is made of a substance called chitin and does not contain bones. A human's skeleton is internal and in an adult contains 206 bones.
A hydraulic skeleton is composed of muscle and fluid.
The hydrostatic skeleton of a jellyfish is made up of various muscles that act as pumps which increase fluid pressure in the tubes that the skeleton is made of. As the pressure goes up, the pseudo skeleton hardens until it becomes rigid from fluid pressure.
the cushion at the ends of the bones is called cartilage and is lubricated with sinovial fluid that is produced by your body.
spongin!
No, nematodes do not have a fluid-filled pseudocoel as a skeleton. Nematodes have a hydrostatic skeleton, which is a combination of fluid pressure and muscles that provide support and movement. The pseudocoel is a body cavity that houses the internal organs in nematodes.
Echinoderms are invertebrates with an internal skeleton and a system of fluid-filled tubes called water vascular system.
The hydra does in fact have a skeleton. The type of skeleton it has is a hydrostatic skeleton where a coelom, or cavity filled with fluid, is surrounded by skeletal muscles.
bone marrow