Register for FREE to remove ads and unlock more features! Learn more. The renin-angiotensin-aldosterone system (RAAS) is a hormone system that regulates blood pressure and water (fluid) balance . This system proceeds through several steps to produce angiotensin II, which acts to stabilize blood pressure and volume.
A fish is any member of a paraphyletic group of organisms that consist of all gill-bearing aquatic craniate animals that lack limbs with digits.Included in this definition are the living hagfish, lampreys, and cartilaginous and bony fish, as well as various extinct related groups.ish do not represent a monophyletic group, and therefore the evolution of fish is not studied as a single event. Early fish from the fossil record are represented by a group of small, jawless, armored fish known as Ostracoderms. Jawless fish lineages are mostly extinct.
A fish is a cold-blooded, backboned, aquatic animal and there are many types of fish that live in every region of the world. Fish are harvested for their highly nutritious meat and for the oil that is extracted and used as a food product or as an ingredient for a wide variety of commercially prepared products.t is one of the most popular types of fish and is used in many processed fish products, such as fish sticks or fish cakes. It is also a variety of fish that is often blended with other types of white fish to produce the fish stick products or other food items containing fish.