What is the endoskeleton?
Endoskeleton is a skeleton based on bones or cartilage that exists completely inside the animal's body. All vertebrates, including people, have endoskeletons. Echinoderms - a class that includes starfish and some anemone of the sea - also have this type of bone structure. It is characterized by the spine from which the bones stretch and protect the internal organs of the animal from the inside.
Although the outside is never seen from the outside, the endoskeleton is still an essential aspect of animals anatomy. It is fully contained in the body and grows with a growing animal. As a result, it differs from the exoskeleton in several ways.
Many insects and crustaceans have exoskeletons that are harsh structures similar to shells that cover the body from the outside. These structures are static, which means they do not grow. Animals with exoskeletons either remain a constant size throughout their lives, or melt their old exoskeletons in order to regenerate brand new as they grow.
On the other hand, endoskeletons are permanent parts of vertebrate bodies. Endoskeleton beginsdevelop in an embryonic stage. The bones of the baby of the animals are often made of cartilage first and then over time rotate to the bones known as ossification. As the animal grows, the bones are strengthened, thickened and extended until they reach full size.
The skeletal system of vertebrates is characterized by several easily identifiable parts. The first is the spine. All endoskeletons are built around the stacked spine of connected discs created as a column in which the central nervous system of the animal is located.
At the top of the spine is a skull that contains the brain. The only exception to this rule is in echinoderms. Echinodermy has no skulls or brains. Their movements are completely controlled by their central nervous system.
limbs, fins and any other limbs also reach from the spine. In most animals, endoskeletons are covered with muscles, ligaments and tissueImmi. These covers allow the endoskeletal to play a major role in body movement and engine control. The bone structure provided by the endoskeleton allows the body to stand, sit, bend and swim with accuracy.
Organ protection is equally important to the function of the endoskeleton. The vertebrate bodies are regulated by the complex system of internal organs, including hearts, lungs, kidneys and liver. The endoskeleton protects these organs from damage by protecting them "cages" of the bones of the rib.
echinoderms are again an exception, because these animals largely lack internal organs. Their internal structure is usually based on a system of hydraulic chambers and channels that move fluids and nutrients throughout the body. These internal chambers resemble the internal functioning of the hydrostatic skeleton, which is flexible, fluid-fidutine that helps soft animals such as earthworms. The main difference between the bone of Echinoderm and the hydrostelet is the calcified bone structure.