Search results
Sep 25, 2024 · heart, organ that serves as a pump to circulate the blood. It may be a straight tube, as in spiders and annelid worms, or a somewhat more elaborate structure with one or more receiving chambers (atria) and a main pumping chamber (ventricle), as in mollusks.
The heart is a muscular organ found in most animals. This organ pumps blood through the blood vessels of the circulatory system. [ 1 ] . The pumped blood carries oxygen and nutrients to the body, while carrying metabolic waste such as carbon dioxide to the lungs. [ 2 ] .
Jan 26, 2024 · What is the heart? The heart is a fist-sized organ that pumps blood throughout your body. It’s your circulatory system ’s main organ. Muscle and tissue make up this powerhouse organ. Your heart contains four muscular sections (chambers) that briefly hold blood before moving it.
Sep 30, 2020 · In this article, we explore the structure of the heart, how it pumps blood around the body, and the electrical system that controls it. Below is an interactive 3D model of the heart. Explore the...
- www.nhlbi.nih.gov
- › < Back To Health Topics
Mar 24, 2022 · Explore some basic facts about keeping your heart healthy. Last updated on March 24, 2022. Learn about your heart’s anatomy, blood flow, electrical system and heartbeat, and heart conditions and diseases.
What is the function of the human heart? Each day, your heart beats around 100,000 times. This continuously pumps about five litres (eight pints) of blood around your body through a network of blood vessels called your circulatory system.
The heart is a muscular organ situated in the mediastinum. It consists of four chambers, four valves, two main arteries (the coronary arteries), and the conduction system.
Oct 4, 2019 · In most people, the heart is located on the left side of the chest, beneath the breastbone. The heart is composed of smooth muscle. It has four chambers which contract in a specific order, allowing the human heart to pump blood from the body to the lungs and back again with high efficiency.
- www.nhlbi.nih.gov
- › …
- › < Back To How the Heart Works
Mar 24, 2022 · Your heart is in the center of your chest, near your lungs. It has four hollow chambers surrounded by muscle and other heart tissue. The chambers are separated by heart valves, which make sure that the blood keeps flowing in the right direction. Read more about heart valves and how they help blood flow through the heart.
The Chambers of the Heart. The Conducting System of the Heart. The Heart Wall. The Pericardium. The Surfaces and Borders of the Heart. The Valves of the Heart. Vasculature of the Heart. Anatomy Video Lectures. START NOW FOR FREE. Popular. Nerves of the Upper Limb The Musculocutaneous Nerve. by Oliver Jones.
