Above all, home security is all about peace of mind. So as you consider the DIY options, think about what will actually make you feel safe. Is video surveillance a big deal?
The osteon is the primary structure that makes up the hard outer layer of bones, which is generally known as â cortical bone .â Cortical bone, or compact bone, is dense, mature bone found in vertebrates such as mammals, amphibians, reptiles, and birds. It is this dense hard layer that gives a person or animal strength.
An endoskeleton (From Greek á¼Î½Î´Î¿Î½, endon = Ã©ndon, within + inner, ÏÎºÎµÎ»ÎµÏÏÏ = skeletos) skeleton is an internal support structure of an, animal composed of mineralized. tissuen endoskeleton may function purely for support (as in the case of sponges), but often serves as an attachment site for muscle and a mechanism for transmitting muscular forces. A true endoskeleton is derived from mesodermal tissue. Such a skeleton is present in echinoderms and chordates.