The nervous and hormonal systems are involved in coordination and homeostasis. However, to maintain each of this organ of the circulatory system and function.


In the body s require a circulatory system that allows each cell present on the surface of the body or deeply embedded in itself, to obtain food, protect against pathogens, to communicate with other cells. and exist in a relatively constant microenvironment.

The complex network of blood vessels surrounding the small intestine absorbs final digestion products. The pituitary gland deep in the brain releases hormones that affect the musculoskeletal, fascial and reproductive systems.  In the vesicles, oxygen from the air diffuses into capillaries, where it binds to hemoglobin in red blood cells.


Over this carrier protein, blood distributes oxygen to every cell in the body. Blood also plays an important role in maintaining the body’s pH. This is generally essential because pH affects the performance and efficacy of each biomolecule.

the organ of the circulatory system and function


organ of circulatory system and function
In humans organ of the circulatory system and function, the heart is a four-chamber organ, containing two atria and two chambers. The atria are the receiving cells and receive blood from the veins.

The oxygenated blood from the lungs reaches the left atrium. It passes into the left ventricle through the mitral valve during atrial contraction. During ventricular contraction, the blood is pumped into the aorta that circulates in the body through the arteries, arterioles, and capillaries.


The exchange of materials occurs through single-celled capillary endothelial walls. Deoxygenated blood from various tissues returns to the right atrium of the heart through two main veins – upper and lower main vein.



Pulmonary gas exchange in alveoli

 The four chambers of the heart along with the main blood vessels and valves. The second, more considerable, the loop is called systemic circulation and begins with the aorta and provides oxygen and nutrients to all body tissues, including the muscles of the heart itself.

 Blood vessels

The thinnest blood vessels are capillaries, made up of a single layer of squamous epithelial cells. These thin tubular structures are the main place for the exchange of materials between the circulatory system and tissues.

organ of circulatory system and function

with the arteries depicted in blue and veins in red. In another hand, arterial blood often has a bright red color and venous blood is darker. Blood collected for casually checking often comes from veins.


The systemic circulation arteries contain oxygenated blood, while the veins bring oxygen-free blood containing large amounts of carbon dioxide into the heart. The opposite situation applies to pulmonary circulation.



Lymphatic circuit

Interstitial fluid is without a color solution that bathes all body cells and forms the main component of the extracellular fluid. It arises thanks to the hydrostatic strength of the blood in the capillaries, which leads to the outflow of water, ions and small substances dissolved from the circulatory system.Thus, interstitial fluid is in many ways similar to blood plasma. Part of this fluid begins to flow in the expanded open network of tubular structures that form the lymphatic circulation.




Atherosclerosis is a general term for the hardening and stiffening of arteries and arterioles. It reason impairment of the cardiovascular system, providing key nutrients to different parts of the body because the arteries must remain flexible to adapt to blood pressure.


If the artery walls or arterioles enhance rigidly, they will not be able to adapt to the fluid pressure generated by each heartbeat, resulting in additional strain on the heart muscles.

organ of circulatory system and function

Among the various causes of atherosclerosis, the formation of a fatty plate that closes the blood vessel is called arteriosclerosis. It is active with damage to inside the wall of the artery or artery endothelium, impurities or the presence of large amounts of low-density lipoprotein (LDL) and cholesterol. The presence of these molecules in the terminated area activates the immune system, recruiting macrophages to the site of damage.




When large numbers of LDL is in the plate, the macrophages are unable to clean the site and undergo necrosis, forming a core of dead cells in the arterial wall. The tile is calcified, as well as the formation of a fibrous envelope around the entire structure.


These events increase resistance to blood flow and reduce the diameter and elasticity of blood vessels. They could also completely displace and move towards smaller blood vessels and close them completely.

Atherosclerosis can lead to many diseases based on a damaged blood vessel. If it affects the arteries that supply blood to the heart, it can lead to angina (chest pain), heart attack or cardiac arrest.


Atherosclerosis can cause an increase in blood pressure when the renal arteries are partially or completely blocked. The total blockage of blood vessels supplying critical oxygen and glucose to the brain causes stroke, with possible irreversible damage to neurons and nerve tissue.


If blood vessels supplying oxygenated blood to extremities or limbs become damaged, it may lead to tissue necrosis and potentially lead to gangrene.



Related biological conditions

Alveoli – Minute balloon bags found at the end of the respiratory tree in the lungs, consisting of a single layer of squamous epithelial cells.

Auricle – An alternative phrase for the heart blood gathering chamber, also known as the atrium.

Diastole – Phase throughout the heart cycle, when the muscles of the heart ease, allowing the chambers to fill with blood.

Systole – refers primarily to the contraction of the heart chambers, sending blood to the main arteries. Atrial contraction is an atrial contraction preceding ventricular contraction.


The organ of the circulatory system and function Clinical significance

Many diseases affect the circulatory system. This contains cardiovascular disease, affecting the cardiovascular system and lymphatic disease attacking the lymphatic system. Cardiologists are medical specializing in the heart, and cardiac surgeons specialize in working at the heart and surrounding areas.



Cardiovascular disease

Atherosclerosis is a precursor to many of these diseases. This is where small atherosclerotic plaques form in the walls of medium and large arteries. It may eventually rise or break to close the arteries.


Another major cardiovascular disease includes the formation of a clot called a “clot”. They can come from veins or arteries. Deep vein thrombosis, which most often occurs in the legs, is one of the reasons for the formation of blood clots in the veins of the legs, especially when the person has remained stationary for a long time.


These clots can reason embolization, which means traveling to a different location in the body. The results may include pulmonary embolism, transient ischemic attacks or stroke.

Cardiovascular diseases can also have an inherent nature, such as heart defects or persistent fetal circulation, where circulatory changes that are to occur after birth are not.




Magnetic resonance angiography of the abnormal subclavian artery
The functioning and health of the cardiovascular system and its parts are measured in various ways manually and automatically.


These include simple methods, such as those that are part of the cardiovascular system, including taking the person’s pulse as a person’s heart rate indicator, taking blood pressure using a blood pressure monitor, or using a stethoscope to listen to the heart for murmurs that may indicate valve problems heart’s.


At the same time when the arteries are visualized, the blockages or constrictions can be determined by inserting stents, and active discounts can be managed by inserting the coils. MRI called an MRI angiogram, can be used to image arteries.


organ of circulatory system and function

Pulmonary circulation when going from the heart. Showing pulmonary and bronchial arteries. The circulatory system of the lungs is the portion of the cardiovascular system in which oxygen-depleted blood is pumped from the heart through the pulmonary artery into the lungs and returned, oxygenated, to the heart via the pulmonary vein.


Oxygen deprived of blood from the upper and lower main veins goes to the right atrium of the heart and flows through the tricuspid valve (right atrioventricular valve) to the right ventricle, from where it is then pumped through the lumbar spine into the pulmonary artery to the lung.


Gas exchange takes place in the lungs so that CO2 is released from the blood and oxygen is absorbed. A separate system known as bronchial circulation supplies blood to the tissue of the larger airways of the lungs.

 Brain circulation

organ of circulatory system and function

The brain has a double blood supply that comes from the arteries on the front and back. The frontal circulation arises from the internal carotid arteries and provides the anterior part of the brain. Back circulation arises from the vertebral arteries and supplies the back of the brain and brain stem. Circulation from the front and from the back connects (anastomosis) in the circle of Willis.



the organ of circulatory system and function kidneys

Renal circulation receives about 20% of cardiac output. It branches off the abdominal aorta and donates blood to the ascending vena cava. It is a blood supply to the kidneys and contains many specialized blood vessels.