Sea urchin yields a key secret of biomineralization
... 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 ...
... 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 ...
... An endoskeleton
is an internal support structure of an animal, ... Echinodermata, Porifera, and Coleoidea. An endoskeleton
may ... endoskeleton
n. An internal supporting skeleton, derived from ...
... 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 ... A powered exoskeleton is a powered mobile machine ...
... 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. ...