circulatory system of bony fish of any kind, as well as cartilaginous fish, a common structure.In the body, they present only one circulation.Schematically, sections of the circulatory system of fish are following the chain of consecutive parts: the heart, abdominal aorta, the artery on the gills, dorsal aorta, arteries, capillaries and veins.
Heart fish has only two cameras and is not fit like other creatures, to perform the functions of the Office of blood flow, oxygen-enriched blood is not oxygenated.Structurally, the heart consists of four chambers arranged one behind the other.These chambers are filled with a special venous blood, and each of the parts of the heart has its own name - the sinus venous, arterial cone, atrium and ventricle.Heart chambers separated by the valve, causing the blood in heart muscle can only move in one direction - the direction of venous blood to the sine of the cone.The circulatory system of fish is arranged in such a way that the flow of blood is carried out exclusively in this direction and not the other way.
role of distribution channels for the body of fish nutrients and oxygen to perform the arteries and veins.Arteries carry out the function of transporting blood from the heart and veins - heart.The arteries contain oxygen-rich (oxygenated) blood in the veins - less oxygen-rich blood (deoxygenated).
Venous blood enters the venous sinus special, after which the current is delivered to the atrium, ventricle and the abdominal aorta.The abdominal aorta is connected to the gills by the four pairs of efferent arteries.These arteries break up into many capillaries in the gill filaments.It is in the gill capillaries and the process of gas exchange, then the capillaries merge into efferent gill arteries.Efferent arteries are part of the dorsal aorta.
closer to the head dorsal aorta branches moving in the carotid arteries.The circulatory system of fish involves the separation of each of the carotid artery on two channels - internal and external.The internal carotid artery responsible for the blood supply to the brain, and external functions as visceral blood supply to part of the skull.
Toward the rear of the body of the fish aortic root merge into a single dorsal aorta.Consistently from her branch out unpaired and paired arteries, and blood system of fish in this part of the somatic division supplies blood to the body and major organs.Ends dorsal aorta caudal artery.All the arteries branch out into many capillaries, and that the process of changing the composition of blood.In the capillaries into the venous blood turns.
Cleaning blood and its subsequent current is carried out as follows.In the head the blood is concentrated in the front of cardinal veins, and in the lower part of the head, it's going in the jugular veins.Extending from head to tail Vienna, in the rear is divided into two parts - the left and right renal portal vein.Further, the left gate Vienna branches, forming a system of capillaries that form a portal system of the kidney on the left.Most bony fish species of the circulatory system is arranged so that the right door system kidneys, usually reduced.
kidney circulatory system of fish forcing blood into the cavity of the posterior cardinal vein.The front, rear and cardinal vein on each side of the body merge into a so-called Cuvier ducts.Cuvier ducts on each side are connected to the venous sinus.As a result, the blood moves from the internal organs current flows into the hepatic portal vein.In the liver door system branches into many capillaries.Then again capillaries merge to form the hepatic vein, which is connected to the venous sinus.
