Overview of the Cardiovascular System
The cardiovascular system mainly consists of the heart which is a powerful pumping organ that ejects blood throughout the body. The heart pumps the blood through a closed system of blood vessels. These blood vessels include the following structures.
- Arteries – this blood vessel carries oxygenated blood away from the heart. All arteries carry oxygenated blood except for the pulmonary and umbilical arteries. It has a higher level of pressure compared to other blood vessels since arterial blood needs to travel to the most distal part of the body. There are many types of arteries which include the pulmonary arteries, aorta, arterioles, and systemic arteries.
- Veins – this blood vessel carries blood toward the heart. The veins mainly carry non-oxygenated blood with a few exceptions such as the pulmonary and umbilical veins. The vein differs from the arteries in structure and position. The veins have lower pressure compared to the arteries and are located more superficially. The veins are less muscular than the arteries and contain valves that facilitate easier travel of blood towards the heart and help to avoid backflow.
- Capillaries – this is the smallest blood vessel of the body and is part of the microcirculation of the body. Capillaries are the site where the veins and arteries are connected. Because of this structure, blood and adjacent tissues are able to exchange fluids, gases, nutrients, and waste materials.
- Lymphatic vessels – this blood vessel is also part of the lymphatic system that carries lymph throughout the body. The lymphatic vessels serve as a reservoir for plasma and other substances that had escaped the vascular system. Eventually, these trapped substances will be drain back to the circulatory system.
Main Components of the Cardiovascular System
Brief Information about the Heart
Summary of the Cardiovascular System
The Cardiovascular system is truly an amazing set of organs and tissues. It has many components that work together to deliver effective circulation of the blood.
This article has given you general information about heart and related structures. The cardiovascular system should be given more attention to know more about how to take care of it.