The circulatory system is an organ system that carries blood throughout the body. It is also known as the cardiovascular system or the vascular system. The human circulatory system supplies the body’s cells with the food and oxygen they need to survive. At the same time, it carries carbon dioxide and other wastes away from the cells. The circulatory system also helps regulate the body’s temperature and carries substances that protect the body from disease. Also, the system transports chemical substances called hormones, which help regulate the activities of various parts of the body. The blood vessels form a complicated system of connecting tubes throughout the body. There are three major types of these blood vessels. Arteries carry blood from the heart. Veins return blood to the heart. Capillaries are extremely tiny vessels that connect the arteries and the veins.
The human circulatory system has three main parts:
(1). The heart.
(2). The blood vessels.
(3). The blood.
A watery fluid called lymph, and the vessels that carry it, are sometimes considered a part of the circulatory system.
The components of the cardiovascular system include heart, blood vessels, and blood. Other components of this system are Arteries, Capillaries, Veins, Coronary vessels, and lungs.
Working Of The Cardiovascular System
Systemic circulation by the cardiovascular system is what takes the aways cardiovascular system from the heart to the rest of the body and bring back oxygen-depleted blood to the heart.
Its main function is to transport nutrients, carbon dioxide, oxygen, blood cells, hormones, from cells in the body, which in turn help the body to fight diseases, maintain pH, and homeostasis.
The process of the circulatory system starts when the heart relaxes between two heartbeats. In this, the blood flows from the upper chamber of the heart to the lower chamber or from atria to ventricles. The following stage is the ejection stage. In this phase, the two ventricles pump the blood into the arteries.
In the cardiovascular system, the left ventricle pumps oxygen-rich blood into the aorta. The blood travels from the aorta and in the capillary network. Then, the blood drops off other nutrients as well as oxygen and picks up carbon dioxide and other waste products. Now, the low-oxygen blood is collected in veins and travels and into the right ventricle of the heart.
The next stage is pulmonary circulation. In this phase, the right ventricle pumps blood low in oxygen into the pulmonary artery, which divides into smaller arteries and capillaries. The capillaries form a fine network around the pulmonary vesicles. This is the area where carbon dioxide is released outside and oxygen enters the bloodstream. Carbon dioxide leaves our body when we breathe out. The oxygen-rich blood then travels through the left atrium and ventricle. The next heartbeat starts a new cycle of this process.