Circulatory System

The circulatory system is an organ system that passes nutrients ,gases, hormones, blood cells, etc. to and from cells in the body to help fight diseases and help stabilize body temperature and maintain homeostasis. Circulatory system is also called cardiovascular system, which means it distributes blood.

The main components of the human cardiovascular system are the heart, the veins, and the blood vessels.It includes the pulmonary circulation,which is a loop through the lungs where blood is oxygenated.And the systemic circulation, a “loop” through the rest of the body to provide oxygenated blood.

The Pulmonary Circulation

The Pulmonary circulation is the portion of the cardiovascular system which transports oxygen-depleted blood away from the heart, to the lungs, and returns oxygenated blood back to the heart.

In this process, deoxygenated blood enters the interior or superior Vena Cava and enters the right atrium of the heart. Then it flows through the tricuspid valve and into the right ventricle. In the right ventricle it will be pumped to the pulmonary arteries and flow to the lungs.

In the lungs it converts the deoxygenated blood to oxygenated blood and then the new oxygenated blood will enter the pulmonary vein. Then it will flow to the left atrium and keeps flowing through mitral valve into the left ventricle. And then the blood will be pumped through the aorta and to the different parts of the body.

The Systemic Circulation

Unlike the Pulmonary Circulation which is the circulation of blood between the heart and the lung, the Systemic circulation is the portion of the cardiovascular system which transports oxygenated blood away from the heart, to the rest of the body, and returns oxygen-depleted blood back to the heart.

Distance-wise, the systemic circulation is longer than the pulmonary circulation. It starts from the aorta, to the different parts of the body, and back to the vena cava of the heart.

Circulatory System Diseases

The circulatory system also can get serious diseases. It can cause death because it involves the human’s most important important body parts, which are the heart and the lung.There are two diseases identified that is a circulatory system disease.

The first one is the heart disease or cardiovascular disease are the class of diseases that involve the heart or blood vessels (arteries and veins). While the term technically refers to any disease that affects the cardiovascular system , it is usually used to refer to those related to atherosclerosis (arterial disease). These conditions usually have similar causes, mechanisms, and treatments.Most countries face high and increasing rates of cardiovascular disease. Each year, heart disease kills more Americans than cancer.

The causes of the heart disease are smoking, alcohol consumption, high blood pressure, high cholesterol, over weight or obese, diabetes that aren’t managed properly, and stress.

The second one is congenital heart defect (CHD) which is a defect in the structure of the heart and great vessels which is present at birth. Many types of heart defects exist, most of which either obstruct blood flow in the heart or vessels near it, or cause blood to flow through the heart in an abnormal pattern.

By: Anindya Pradnya P 9C


About encyclopediascience

This site is to post about the human health. It explains how the human health varies from Digestive System,Nervous System, Drug Abuse , etc. Enjoy!
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