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2. Heart - Wikipedia

   en.wikipedia.org/wiki/Heart

   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]

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

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

   The heart has three layers. They are the: Epicardium: This thin membrane is the outer-most layer of the heart. Myocardium: This thick layer is the muscle that contracts to pump and propel blood ...

4. Cardiac Muscle Tissue: Function, Structure, Conditions, and ...

   www.healthline.com/health/cardiac-muscle-tissue

   Cardiac muscle tissue is only found in your heart. It performs involuntary, coordinated contractions that allow your heart to pump blood through your circulatory system. Cardiac muscle tissue is ...

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. Cardiac muscle - Wikipedia

   en.wikipedia.org/wiki/Cardiac_muscle

   Cardiac muscle (also called heart muscle or myocardium) is one of three types of vertebrate muscle tissues, with the other two being skeletal muscle and smooth muscle. It is an involuntary, striated muscle that constitutes the main tissue of the wall of the heart. The cardiac muscle (myocardium) forms a thick middle layer between the outer ...

7. Atrium (heart) - Wikipedia

   en.wikipedia.org/wiki/Atrium_(heart)

   Atrium (heart) The atrium ( Latin: ātrium, lit. 'entry hall'; pl.: atria) is one of the two upper chambers in the heart that receives blood from the circulatory system. The blood in the atria is pumped into the heart ventricles through the atrioventricular mitral and tricuspid heart valves . There are two atria in the human heart – the left ...

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

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

   Coronary artery problems can manifest differently in men and women. Pain will appear in the man's chest, but women may feel pain in their chest, arm, face, upper stomach, or back. Other signs you ...

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

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

   Right side of the heart. Blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium. As the atrium ...