Heart - Wikipedia
[8] The heart pumps blood with a rhythm determined by a group of pacemaker cells in the sinoatrial node. These generate an electric current that causes the heart to contract, traveling …
Heart | Structure, Function, Diagram, Anatomy, & Facts | Britannica
Oct 21, 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 …
Heart: Anatomy & Function - Cleveland Clinic
Your heart is the main organ of your cardiovascular system, a network of blood vessels that pumps blood throughout your body.
Heart Anatomy, Function, and Blood Circulation - WebMD
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.
American Heart Association | To be a relentless force for a world …
5 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, …
Heart Anatomy: Diagram, Blood Flow and Functions - MedicineNet
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.
How the Heart Works - What the Heart Looks Like | NHLBI, NIH
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 …
The Anatomy of the Heart, Its Structures, and Functions
May 14, 2025 · The heart is situated within the chest cavity and surrounded by a fluid-filled sac called the pericardium. This amazing muscle produces electrical impulses that cause the heart …
Heart Anatomy: Labeled Diagram and Quick Reference
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.
Heart Pictures, Diagram & Anatomy | Body Maps - Healthline
Mar 10, 2015 · The heart is a mostly hollow, muscular organ composed of cardiac muscles and connective tissue that acts as a pump to distribute blood throughout the body’s tissues.