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.
The anal fin is located between the pelvic and caudal fins on the bottom, or ventral, part of the shark. Caudal Fins When it comes to the shark having the ability to propel itself through the water, they utilize what is called the caudal fin. This fin, also known as the tail fin, has an upper and lower lobe that, depending on the type of shark, can vary in shape and size. The upper lobe of the caudal fin produces the majority of the sharkâs thrusting abilities. The tail fin is one of the most important parts of the entire shark anatomy. Types Of Shark Tail Fins Because of all of these different types of fins, sharks are able to maneuver swiftly through the water while also remaining stabilized.