The Major Functions Of The Circulatory System – Several terms lead here. For the Ed Sheeran song, see Bloodstream (song). For the Youves album, see Cardio-Vascular.

Human circulatory system (simplified). Red represents oxygenated blood carried in the arteries. Blue represents deoxygenated blood carried in the veins. Capillaries join arteries and veins.

The Major Functions Of The Circulatory System

The Major Functions Of The Circulatory System

The circulatory system is a system of organs that includes the heart, blood vessels, and blood that circulates throughout tire body of a human or vertebrate.

The Circulatory System

It includes the cardiovascular system, or the vascular system, which consists of the heart and blood vessels (from the Greek kardia, meaning heart, and from the Latin vascula, meaning vessels). The circulatory system has two parts, a systemic circulation and a pulmonary circulation.

The network of blood vessels of the large vessels of the heart includes large elastic arteries and large veins. Other arteries, smaller arteries, capillaries that join the venules (small veins), and other veins. The circulatory system in vertebrates is closed, meaning that blood never leaves the network of blood vessels. Some invertebrates, such as arthropods, have a circulatory system. Diplasts, like combed sponges and jellies, lack a circulatory system.

Blood is a liquid made up of plasma, red blood cells, white blood cells and platelets. It circulates around the body and carries oxygen and nutrients to the tissues and collects and removes waste products. Circulating nutrients include proteins and minerals, and other compounds include hemoglobin, hormones, and gases such as oxygen and carbon dioxide. These substances nourish, help the body’s immune system fight diseases, and help maintain homeostasis by stabilizing the temperature and normal pH.

In vertebrates, the lymphatic system complements the circulatory system. The lymphatic system transports excess plasma (filtered from the capillaries of the circulatory system as interstitial fluid between cells) from the body’s tissues through collateral pathways that return the excess fluid to the circulation as lymph.

The Circulatory System: Its 4 Main Parts And How They Work

The lymphatic system is a subsystem that is essential to the functioning of the circulatory system. Without it, the blood is depleted of fluid.

And unlike the closed circulatory system (blood), the lymphatic system is an epi system. Some sources describe it as a secondary circulatory system.

The circulatory system can be affected by many cardiovascular diseases. Cardiologists are medical professionals who specialize in the heart, and cardiac surgeons specialize in surgery on the heart and its surrounding areas. Vascular surgeons focus on disorders of blood vessels and lymphatic vessels.

The Major Functions Of The Circulatory System

The cardiovascular system in all vertebrates consists of the heart and blood vessels. The circulatory system is further divided into two main circuits – pulmonary circulation and systemic circulation.

Functions Of Blood: Transport Around The Body

Pulmonary circulation is a circuit from the right heart that carries deoxygenated blood to the lungs, where it is oxygenated and returned to the left heart. Systemic circulation is a loop that carries oxygenated blood from the left heart to the rest of the body and returns deoxygenated blood to the right heart through the large veins called vae cavae. Systemic circulation can also be defined into two parts – a macrocirculation and a microcirculation. An average adult contains five to six liters (about 4.7 to 5.7 liters) of blood, which makes up about 7% of their total body weight.

Blood consists of plasma, red blood cells, white blood cells and platelets. The digestive system also works with the circulatory system to provide the nutrients the system needs to keep the heart pumping.

Additional circulatory pathways such as coronary circulation to the heart itself, cerebral circulation to the brain, circulation to the kidneys and bronchial circulation to the bronchi are connected in the lungs.

The lymphatic system is a major subsystem of the circulatory system, consisting of a network of lymphatic vessels, lymph nodes, organs, tissues, and circulating lymph. This subsystem is an operating system.

Overview Of The Circulatory System

The main function of lymph transport is to drain and return the interstitial fluid into the lymphatic vessels to the heart to return to the circulatory system. Another major function is to work with the immune system to create a defense against pathogens.

The heart pumps blood to all parts of the body, supplying nutrients and oxygen to every cell and removing waste products. The left heart pumps oxygenated blood from the lungs back to the rest of the body in the systemic circulation. The right heart pumps deoxygenated blood to the lungs in the pulmonary circulation. In the human heart, there is one atrium and one ventricle for each circulation, and with systemic and pulmonary circulation there are a total of four chambers: left atrium, left atrium, right atrium, and right atrium. The right atrium is the upper right chamber of the heart. Blood returned to the right atrium is deoxygenated (poor in oxygen) and enters the right vena cava to be pumped through the pulmonary artery to the lungs for reoxygenation and removal of carbon dioxide. The left atrium receives fresh oxygenated blood from the lungs as well as the pulmonary vein, which is transferred into the left atrium to be pumped through the aorta to the various organs of the body.

Pulmonary circulation is a part of the circulatory system in which deoxygenated blood is pumped from the heart to the lungs through the pulmonary artery and returned to the heart with oxygen through the pulmonary vein.

The Major Functions Of The Circulatory System

Deoxygenated blood passes through the cavity of the upper and lower right atrium of the heart and flows through the tricuspid valve (right atrial valve) into the right tricuspid, and from there it is pumped into the pulmonary artery through the pulmonary seminiferous valve. Lungs Gas exchange takes place in the lungs, as a result of which CO2 is released from the blood and oxygen is absorbed. The pulmonary vein returns the now oxygen-rich blood to the left atrium.

The Circulatory System For Kids

A separate circuit from the systemic circulation, the bronchial circulation delivers blood to the tissue of the larger airways of the lung.

Systemic circulation is a loop that carries oxygenated blood from the left heart to the rest of the body through the aorta. Deoxygenated blood in the systemic circulation is returned to the right heart through two large veins. Systemic circulation can also be defined as having two parts – a macrocirculation and a microcirculation.

Blood vessels are the arteries, veins and capillaries of the circulatory system. The large arteries and veins that carry blood to and from the heart are known as the great vessels.

The first part of the systemic circulation is the aorta, a large, thick-walled artery. After passing through the aortic opening of the diaphragm, the aorta arches at the level of the thoracic vertebrae and gives branches that supply the upper part of the body and divide the abdomen.

The Vein System

Aortic walls are elastic. This elasticity helps maintain blood pressure throughout the body.

When the aorta receives approximately five liters of blood from the heart, it recoils and is responsible for pulsatile blood pressure. As the aorta branches into smaller arteries, their elasticity decreases and their compliance increases.

The Vous system feeds two main veins: the superior vacava – which mainly drains the tissues above the heart – and the inferior vacava – which mainly drains the tissues below the heart. These two large veins enter the right atrium of the heart.

The Major Functions Of The Circulatory System

The basic rule is that the arteries of the heart branch off into capillaries, which collect into veins that lead to the heart. Portal veins are a slight exception to this. In humans, the only important example is the hepatic portal vein, which is composed of capillaries around the digestive tract, where the blood absorbs the various products of digestion. Instead of returning directly to the heart, the hepatic portal vein branches into a second capillary system in the liver.

Circulatory System: Function, Parts, Role

The heart itself is supplied with oxygen and nutrients through a small “loop” of systemic circulation, and a very small amount of blood is obtained from the four chambers. The coronary circulation system provides blood supply to the heart muscle. Coronary circulation begins near the origin of the aorta by two coronary arteries: the right coronary artery and the left coronary artery. After feeding the heart muscle, the blood returns to the coronary sinus through the coronary veins and from this vein to the right atrium. Backflow of blood is prevented by its opening during atrial systole by the valve of Tebes. The smallest cardiac veins drain directly into the heart chambers.

The brain has a dual blood supply, an anterior and posterior circulation from anterior and posterior arteries. Anterior circulation arises from the internal carotid arteries to supply the anterior part of the brain. Posterior circulation arises from the vertebral arteries to supply the back of the brain and the brainstem. Blood circulation from the front and back joins in the circle of Willis (anastomosis). Neurovascular unit, consisting of different types

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