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.
1. cytoskeleton 2. pellicle - it's like a cell wall, only a lot more flexible 3. hydroskeleton. Water is enclosed in extracellular spaces. 4. exoskeleton. semi-rigid extracellular structures of chitin give shape to the organism 5. endoskeleton. internal bone structures. May be cartilaginous or mineralized.