Heart | Structure, Function, Diagram, Anatomy, & Facts | Britannica
The heart is an 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 pump that is the center of the circulatory system in humans, other mammals, and birds.

Heart: Anatomy & Function - Cleveland Clinic
Your heart contains four muscular sections (chambers) that briefly hold blood before moving it. Electrical impulses make your heart beat, moving blood through these chambers. Your brain and nervous system direct your heart’s function.

Heart (band) - Wikipedia
Heart rose to fame with music influenced by hard rock and heavy metal [4] as well as folk music. The band underwent a major lineup change between the late 1970s and the early 1980s; by 1982 Fisher, Fossen, and Derosier all had left and were replaced by Mark Andes (bass) and Denny Carmassi (drums).

Heart Anatomy, Function, and Blood Circulation - WebMD
Learn about heart anatomy, including chambers, valves, and blood vessels, and how they coordinate blood circulation to keep the body functioning.

How the Heart Works - What the Heart Looks Like | NHLBI, NIH
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 pumped out to the lungs.

Heart - Alone - YouTube
Official Music Video for Alone performed by Heart. Follow Heart Instagram: / heartofficial Twitter: / officialheart Facebook: / heart Website: https://www.heart-music.com #Heart #Alone...

Heart - Simple English Wikipedia, the free encyclopedia
In people, the heart is about the size of a closed-hand and sits in between the lungs, in the chest-centered cavity. In humans, the heart has four parts called chambers. These are the upper-left and upper-right atria, and the lower-left and lower-right ventricles.

The heart: Anatomy, how it works, and more - Medical News Today
The heart is a muscular organ about the size of a closed fist, which sits in the chest, slightly to the left of center. It beats around 100,000 times per day to deliver oxygen- and nutrient-rich...

The Heart: Anatomy and 3D Illustrations - Innerbody
Explore the anatomy and core functions of the heart with Innerbody's interactive 3D model.