In humans, the heart is approximately the size of a closed fist and is located between the lungs, in the middle compartment of the chest, called the mediastinum. [4]

Dec 6, 2025 · Heart, organ that serves as a pump to circulate the blood. It may be as simple as a straight tube, as in spiders and annelid worms, or as complex as the four-chambered double …

Mar 24, 2022 · This image shows the four chambers of the heart and the direction that blood flows through the heart. Oxygen-poor blood, shown in blue-purple, flows into the heart and is …

Aug 22, 2024 · Learn about the anatomy of the heart and how its chambers, valves, and vessels work together to maintain effective blood circulation throughout the body to sustain life.

Jan 26, 2024 · Your heart contains four muscular sections (chambers) that briefly hold blood before moving it. Electrical impulses make your heart beat, moving blood through these …

6 days ago · Learn more about the American Heart Association's efforts to reduce death caused by heart disease and stroke. Also learn about cardiovascular conditions, ECC and CPR, …

Jan 8, 2025 · Learn about the heart's anatomy, how it functions, blood flow through the heart and lungs, its location, artery appearance, and how it beats.

Sep 3, 2025 · The anatomy of the human heart starts with understanding each of the four chambers. Learn about the upper, lower, right, and left parts of heart anatomy.

Dec 31, 2025 · Explore the anatomy and core functions of the heart with Innerbody's interactive 3D model.

Jun 27, 2025 · Heart symbols in cartoons and emoji do not look like an actual human heart. In reality, the heart is more spherical in shape, except it's narrower at the bottom than the top.