Science Project/Science Experiment
Learn how human heart works.
For any feedback please write to us: smartscholar.edu@gmail.com The heart is one of the most important organs of human body. It is a muscular organ which pumps blood throughout the body,. Heart beats approximately 72 times per minute. The heart is a muscle which is a little larger than our fist. The walls of the heart are made up of three layers, while the cavity is divided into four parts. There are two upper chambers, called the right and left auricle, and two lower chambers, called the right and left ventricles. Pulmonary artery: The pulmonary artery conveys blood from the heart to the lungs for oxygenation for further circulation to different parts of the body. Pulmonary vein: Pulmonary veins carry oxygenated blood from the lungs to the left auricle. Left auricle: The left auricle is one of the heart's four hollow chambers. it is on the upper right hand side of the heart. Oxygen-rich blood enters the left auricle from the pulmonary veins. The left auricle then pumps this blood directly into the left ventricle. Left ventricle: The left ventricle is the lower left-hand chamber of the heart. Together with the right ventricle, it forces blood out of the heart into the arteries throughout the body. The left ventricle has a much thicker wall than the right ventricle Right ventricle: The right ventricle is the lower right-hand chamber of the heart. Together with the left ventricle, it forces blood out of the heart into the arteries throughout the body. The right ventricle has a much thinner wall than the left ventricle. This chamber pumps blood a fairly short distance to the lungs. Valves: Heart valves are flap-like structures that allow blood to flow in one direction. They separate the chambers of heart so that there is no mixing of blood. Right auricle: The right auricle is a small cone-shaped and is very muscular and is lined with small muscles on its surface. It collects deoxygenated blood from the bloodstream and moves it into the heart's right ventricle. Aorta: The aorta is the largest artery in the body. The aorta begins at the top of the left ventricle, the heart's muscular pumping chamber. The heart pumps blood from the left ventricle into the aorta through the aortic valve. Functioning of Heart: Right-Hand Side of the Heart The right-hand side of the heart receives de-oxygenated blood from the body tissues (from the upper- and lower-body via the superior vena cava and the inferior vena cava, respectively) into the right atrium. This de-oxygenated blood passes through the tricuspid valve into the right ventricle. This blood is then pumped under higher pressure from the right ventricle to the lungs via the pulmonary artery. Left-Hand Side of the Heart The left-hand side of the heart receives oxygenated blood from the lungs (via the pulmonary veins) into the left atrium. This oxygenated blood then passes through the bicuspid valve into the left ventricle. It is then pumped to the aorta under greater pressure . This higher pressure ensures that the oxygenated blood leaving the heart via the aorta is effectively delivered to other parts of the body via the vascular system of blood vessels . The function of the right side of the heart is to collect de-oxygenated blood, in the right atrium, from the body and pump it, through the valve, via the right ventricle, into the lungs so that carbon dioxide can be exchanged for oxygen. The left side of the heart collects oxygenated blood from the lungs into the left atrium. From the left atrium the blood moves to the left ventricle, through the valve , which pumps it out to the body via the aorta.
0 Comments