Human Blood Circulation

Introduction to human body blood circulation:

In human body Blood circulation is essential for a healthy body. Oxygen rich blood is sent to the body organs, tissues and cells to nourish them and the waste products are disposed of through the same system. The lungs, the heart and the blood vessels need to work together to form the blood circulatory system. The pumping of the heart forces the blood on its journey. The blood circulation systems of human body have three distinct parts: pulmonary circulation, coronary circulation, and systemic circulation.

Human Body Pulmonary Circulation:

Circulation of blood from the heart to the lungs and back to the heart again. The veins bring waste-rich blood back to the heart, enters the right atrium through two large veins called vena cavae. The right atrium is filled with the waste-rich blood and contracts, pushing the blood through a one-way valve into the right ventricle. The right ventricle fills, then contracts, pushing the blood into the pulmonary artery which leads to the lungs. In the lung capillaries, the exchange of oxygen and carbon dioxide takes place. Now fresh oxygen-rich blood enters the pulmonary veins and returns to the heart, through the left atrium. The blood rich in oxygen then passes through a one-way valve into the left ventricle where it will exit the heart through the main artery, called the aorta. The left ventricle's contracts and forces the blood into the aorta and the blood starts its circulation throughout the body.

Human Body Systemic Circulation:

Circulation of blood is throughout the body. Blood vessels are responsible for supplying nourishment and oxygen to all of the tissue located throughout the body. Blood rich in oxygen enters the blood vessels through the heart's main artery called the aorta. The contraction of left ventricle of the heart forces the blood into the aorta which then branches into many smaller arteries which run throughout the body. Blood rich in oxygen enters the capillaries where the oxygen and nutrients are released. Then waste is collected and the waste-rich blood flows into the veins in order to circulate back to the heart where pulmonary circulation will allow the exchange of gases in the lungs.

Human Body Coronary Circulation:

Circulation of blood is in the heart. Providing nourishment to the tissues of the heart through the capillaries located in the heart.