The Human Heart

The Human Heart – Learning objectives At the end of this lesson, you should be able to know: What is the function of the heart Structure of the heart Physiology of the heart

What is the heart? Structure of the heart The heart is a muscular organ in humans and other animals, which pumps blood through the blood vessels of the circulatory system. In humans, the heart is located between the lungs, in the middle compartment of the chest. Structure of the heart In humans, other mammals, and birds, the heart is divided into four chambers: upper left and right atria; and lower left and right ventricles. Commonly the right atrium and ventricle are referred together as the right heart and their left counterparts as the left heart. Fish, in contrast, have two chambers, an atrium and a ventricle, while reptiles have three chambers.

Physyonomy of the heart The heart is a key organ in the circulatory system responsible for the generation of pressure and thus flow throughout the system and pulmonary circulatory systems. The heart contains four chambers, two atria and two ventricles. The blood that is returned to the right atrium is deoxygenated and s passed into the right ventricle to be pumped through the pulmonary artery to the lungs for reoxygenation and removal of carbon dioxide. The left atrium receives newly oxygenated blood from the lungs through the pulmonary veins, which is passed into the strong left ventricle to be pumped through the aorta to the different organs of the body.

The heart is a key organ in the circulatory system responsible for the generation of pressure and thus flow throughout the system and pulmonary circulatory systems. The heart contains four chambers, two atria and two ventricles. The blood that is returned to the right atrium is deoxygenated and s passed into the right ventricle to be pumped through the pulmonary artery to the lungs for reoxygenation and removal of carbon dioxide. The left atrium receives newly oxygenated blood from the lungs through the pulmonary veins, which is passed into the strong left ventricle to be pumped through the aorta to the different organs of the body. https://www.boundless.com/physiology/textbooks/boundless-anatomy-and-physiology-textbook/cardiovascular-system-blood-vessels-19/blood-flow-through-the-body-185/blood-flow-in-the-heart-925-4649/

Pulmonary right artery Superior Vena Cava Pulmonary left artery Pulmonary right artery Right atrium Inferior Vena Cava Right ventricle