What does the cerebrum in charge of in the brain?

Answer 1

A fish is part of the vertebrate phylum. A typical fish is cold blooded, with some exceptions being tuna and different species of sharks. There are three different classes of fish: Agnatha (jawless), Chondrichthyes (cartilage), and Osteichthyes (bony). Some examples of the jawless fish include the sea lamprey and hagfishes. Examples of the cartilage fish include sharks and sting rays. All ray finned and lobe finned fishes are part of the bony fishes. The fish has an advent jaw that allows the fish to eat a variety of foods, including plants and other organisms. Fish take in food through the mouth and is then broken down in the esophagus. In the stomach, the food is digested more and is further processed by fingerlike projections called the pyloric ceca. The pyloric ceca secrete digestive enzymes and absorb nutrients from the digested food. The liver and the pancreas also supply other enzymes that aid in digestion as the food moves through the digestive tract. The intestine completes the process of digestion and nutrient absorption. Most fish exchange gases using gills that are located on either side of the pharynx. Each gill is made up of threadlike filaments that contain capillaries that allow for a larger surface area for exchange of oxygen and carbon dioxide. Fish exchange gases by pulling in oxygen-rich water through their mouths and pumping in through the gill filaments. The blood flows in the opposite direction to the water, creating a counter current exchange. They then push the oxygen-poor water out through the openings on the sides of the pharynx. The gill opening is hidden underneath the protective cover called the operculum. Fish, such as the betta fish, have an organ called the labyrinth that allows them to survive in oxygen-poor environments by allowing them to take in oxygen from air. There are factors that affect the respiration rate in fish. Factors include: the temperature of water (decreases), the number of fish (increases), and an increase in activity (increases). Fish have a closed circulatory system with a heart that pumps blood in a single loop throughout the body. The blood moves in a circular motion from the heart to the gills to the rest of the body and then back to the heart. Fish have a two-chambered heart. Most fish release their nitrogenous wastes as ammonia. Some of the wastes diffuse through the gills into the surrounding water. The kidneys filter wastes from the blood. Fish have a well adapted nervous system that is organized around a central brain that is divided into parts. On the front of the brain are the olfactory bulbs, which are involved in the fish's sense of smell. The cerebrum of the brain is primarily responsible for the fish's sense of smell, rather than voluntary actions. Most fish have highly developed sense organs. All daylight fish have well developed eyes. The optic lobes in the brain process all the information from the eyes. Many fish do not hear sounds very well. Fish have sensitive receptors that form the lateral line. This lateral line helps fish detect vibrations and gentle currents. It can sense motion of nearby fish and prey. Fish move by contracting paired sets of muscles on either side of the backbone alternately. As the muscles contract, the fish forms S-shaped curves that move down the fish's body. As these curves reach the back fins, a backward force is created and in conjunction with the fins, the fish moves forward. Fins help increase the surface area of the tail, allowing for extra speed. Many fish have a swim bladder to keep them from sinking. The swim bladder adjusts their buoyancy through the manipulation of gases in the body. There are three different ways fish reproduce. The majority of fish are oviparous, where eggs are shed and fertilized outside of the body. An example of a fish that is oviparous is the salmon. Ovoviviparous fish keep the eggs inside the body after internal fertilization. Each embryo develops its own egg and the young are "born alive" (like mammals). Viviparous allow their embryos to stay inside the mother's body, but obtain needed substances from the mother not the material in the egg. The young are "born alive."

Answer 2

cerebrum is in charge of balance