The term was then exported with Prussian officers and nobles to Russia. The Feldsher system of rural primary care provided some of the inspiration for China's barefoot doctors. Today feldshers can be found in every medical setting from primary to intensive care. They are often the first point of contact with health professionals for people in rural areas.
1 The prospect of a food chain minus its apex predators may mean the end of the line for many more species. 2  Sharks have widespread global distribution, are highly migratory and play a vital role in maintaining the health of ocean ecosystems.
Sharks fertilize the egg within the female body which is unique for a bony fish [4]. The male shark has a sex organ called claspers which transfers sperm into the female shark in order to fertilize eggs [4]. The embryo can spend up to two years developing inside the mother [4]. Sharks will sometimes give birth directly to baby sharks or release their eggs on the ocean bed [4].