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2. Heart - Wikipedia

   en.wikipedia.org/wiki/Heart

   Primitive fish have a four-chambered heart, but the chambers are arranged sequentially so that this primitive heart is quite unlike the four-chambered hearts of mammals and birds. The first chamber is the sinus venosus, which collects deoxygenated blood from the body through the hepatic and cardinal veins. From here, blood flows into the atrium ...

3. Heart Pictures, Diagram & Anatomy | Body Maps - Healthline

   www.healthline.com/human-body-maps/heart

   Endocardium: The innermost layer is thin and smooth. The heart is divided into four chambers: two atria and two ventricles. Blood is transported through the body via a complex network of veins and ...

4. Anatomy of the human heart - Wikipedia

   en.wikipedia.org/wiki/Anatomy_of_the_human_heart

   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. The left and right sides of the heart have different functions: the right side receives de-oxygenated blood through the superior and inferior venae cavae and pumps blood to the lungs through the pulmonary artery, and the left ...

5. 24 Fun Facts About the Heart - Healthline

   www.healthline.com/health/fun-facts-about-the-heart

   The human heart weighs less than 1 pound. However, a man’s heart, on average, is 2 ounces heavier than a woman’s heart. A woman’s heart beats slightly faster than a man’s heart. The ...

6. Circulatory System Anatomy, Diagram, & Function - Healthline

   www.healthline.com/human-body-maps/circulatory...

   The heart has four chambers: the right and left atria, and the right and left ventricles. Together, they make up the heart’s internal cavity. The four chambers play an important role in ...

7. How the Heart Works: How Blood Flows, Parts of the Heart, and ...

   www.webmd.com/.../hypertension-working-heart

   As the heart beats, it pumps blood through a system of blood vessels, called the circulatory system. The vessels are elastic, muscular tubes that carry blood to every part of the body. Blood is ...

8. Cardiovascular (Heart) Diseases: Types and Treatments - WebMD

   www.webmd.com/heart-disease/diseases-cardiovascular

   Congenital Heart Disease. This is a problem in one or more parts of the heart or blood vessels. It happens before birth. About 8 out of every 1,000 children get it. They may have symptoms at birth ...

9. Coronary Arteries: Functions, Location, Health Problems, and More

   www.webmd.com/heart-disease/coronary-arteries...

   Coronary arteries function primarily to bring blood to your heart muscle. Without keeping the heart muscle oxygenated, you would be at greater risk of heart disease and heart attacks. Most people ...