Specifically, it is the tissues in the bone which makes up the skeleton. This bone tissue is composed of cells with extracellular matrix that is calcified. Bone contains collagen and calcium phosphate which contribute to it mineral structure and firmness.
Newts are generally a safe pet, however there are a few species that are known to carry salmonella, and other species are in fact poisonous, but only if consumed. The brightly colored bellies of a newt are one way to tip a person off to their toxicity.ewts are generally a safe pet, however there are a few species that are known to carry salmonella, and other species are in fact poisonous, but only if consumed. The brightly colored bellies of a newt are one way to tip a person off to their toxicity.
If you encounter a toadfish from the genus Thalassophryninae, you should keep in mind that this fish is poisonous. It has one dorsal spine on each opercle and two dorsal spines, and these four spines are all hollow and connected to venom glands. The poison is potent enough to cause a painful wound.