The circulatory system, also known as the cardiovascular system, is an enormous network that functions as a distribution between organs and blood vessels. It also works as the body’s waste discharge system. According to the non-profit Nemours Child Health System, nutrients, oxygen and hormones are delivered to each cell and waste products such as carbon dioxide are removed as these requirements are met.
The circulatory system not only keeps our cells healthy, it also keeps us alive. According to Nemouros, the heart constantly receives signals from the rest of the body that guide how often to pump to properly deliver what the body needs. For example, while sleeping, the body sends electrical signals to the heart to slow down. When doing heavy exercise, the heart receives the message that it must pump faster to deliver more oxygen to the muscles.
How Does the Circulatory System Work?
The heart is located in the middle of the circulatory system and pumps blood to the rest of the network. According to the University of Michigan, this hollow muscle consists of 4 chambers: the upper two chambers consist of the right and left atria (atria), and the right and left ventricles (ventricles) form the lower two chambers of the heart.
These chambers are separated by unidirectional valves to make sure that blood flows in the right direction. The remainder of the circulatory system consists of 2 independent network systems that work together: the pulmonary and systemic systems. According to the National Biotechnology Information Center (NCBI), the pulmonary system is responsible for delivering fresh oxygen to the blood and removing carbon dioxide from the blood. Oxygen-poor blood reaches the veins leading to the right atrium of the heart. Blood is pumped directly into the right ventricle.
It is then pumped into the pulmonary artery, which divides into two and progressively smaller arteries (arteries) and capillaries before entering the lungs. Small capillaries create a network that allows carbon dioxide and oxygen exchange in the lungs. Oxygen-rich blood returns from the lungs to the heart. Then the systemic system; The arteries take over the vein and capillary system. Although the veins and arteries (arteries and veins) are not the same, both are types of blood vessels. Arteries carry oxygen and nutrient-rich blood from the heart to the whole body, according to the National Cancer Institute. The veins transport oxygen and nutrient-poor blood back to the heart. Capillaries are the smallest type of veins, they form a bridge between veins and arteries.
According to the NCBI, when oxygen-rich blood comes from the lungs, it enters the left atrium and then passes into the left ventricle before being pumped into the body.
Before the blood is transported through the smaller artery to each part of the body, the blood is pumped through the aortic vein (the body’s largest artery). As blood delivers nutrients and oxygen to each cell, it flows to capillaries and veins, while carbon dioxide and other waste products are collected. The contraction and relaxation of the heart – heartbeats – is controlled by the sinus node, a cluster of cells located above the right atrium. This sinus node sends electrical signals through the heart’s electrical system that direct the muscles to contract or relax.
The heartbeat consists of two phases: the phases of heart contraction and relaxation (systole and diastole).
At first, the ventricles contract and push the blood into the pulmonary artery (pulmonary artery) or aorta. At the same time, the valves that separate the auricles and ventricles are closed to prevent blood from flowing backwards. In the relaxation phase, the valves associated with the atrium open, the ventricles relax and fill with blood. The sine node controls the speed of both phases.
According to the Arkansas Heart Hospital, approximately 5 or 6 liters (slightly less than 5 to 6 liters) of blood are pumped through the body in an adult. The average heart beats 100,000 times a day, pumping 7,570 liters of blood through 96,560 kilometers of blood vessels. It takes approximately 20 seconds for blood to travel through the entire circulatory system.
Circulatory System Diseases
Heart disease is a leading cause of death for both men and women in the United States, with 610,000 people dying from it each year, according to the Center for Disease Control and Prevention.
Heart disease, Paralysis (including a blockage in the blood going to the brain) heart attack (blocking of blood flow to the heart), hypertension(high blood pressure causing the heart to work harder),arteriosclerosis (thickening and hardening of the arteries), aneurysm It is a wide range of diseases and disorders of the circulatory system, such as (damaged vessel causing internal bleeding). Risk factors for heart disease include age, gender, family history, poor diet, smoking and stress, as well as high blood pressure and high cholesterol levels, according to the Mayo Clinic.
There are many ways to prevent heart disease, including maintaining a healthy diet, including keeping other health conditions under control, regular physical exercise, and keeping stress levels to a minimum.