Sea urchin yields a key secret of biomineralization
...X-rays produced by synchrotron radiation to observe how the sea urchin builds its spicules, the sharp crystalline "bones" that constitute the animal's endoskeleton
at the larval
Similar to teeth and bones, the sea urchin spicule is a biomineral, a composite of organic material and mineral componen...
...ies or buildings may also acquire skeletons.)
Skeletal systems are commonly divided into three types - external (an exoskeleton ), internal (an endoskeleton
), and fluid based (a hydrostatic skeleton ), though hydrostatic skeletal systems may be classified separately from the other two since they lack har...
is an internal support structure of an animal, composed of mineralized tissue. In three phyla and one subclass of animals, endoskeletons of various complexity are found: Chordata, Echinodermata, Porifera, and Coleoidea. An endoskeleton
may function... endoskeleton
n. An i...
...at supports and protects an animal's body, in contrast to the internal endoskeleton
of, for example, a human. Some animals, such as the tortoise, have both an endoskeleton
and an... A powered exoskeleton is a powered mobile machine consistin...
... A distinct phenotype? ... Bone marrow stromal stem cells : nature, biology, and potential ... Bones are rigid organs that form part of the endoskeleton
of vertebrates. They function to move, support, and protect the various organs of the body, produce red and white blood cells and store minerals. ...