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May 16, 2024 · 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 pump that is the center of the circulatory system in humans, other mammals, and birds.
- The Editors of Encyclopaedia Britannica
- Where is the heart located in the human body?In humans, the heart is situated between the two lungs and slightly to the left of center, behind the breastbone. It rests on the diaphragm, the mu...
- What is the heart wall made up of?The heart consists of several layers of a tough muscular wall, the myocardium. A thin layer of tissue, the pericardium, covers the outside, and ano...
- What causes the heart to beat?The pumping of the heart, or the heartbeat, is caused by alternating contractions and relaxations of the myocardium. These contractions are stimula...
- What are heart sounds?The rhythmic noises accompanying the heartbeat are called heart sounds. The two distinct sounds are heard, a low, slightly prolonged “lub” (first s...
The heart is a muscular organ found in most animals. This organ pumps blood through the blood vessels of the circulatory system. The pumped blood carries oxygen and nutrients to the body, while carrying metabolic waste such as carbon dioxide to the lungs.
- Overview
- Causes
- Risk Factors
- Complications
- Prevention
Heart disease describes a range of conditions that affect the heart. Heart diseases include: 1. Blood vessel disease, such as coronary artery disease 2. Irregular heartbeats (arrhythmias) 3. Heart problems you're born with (congenital heart defects) 4. Disease of the heart muscle 5. Heart valve disease Many forms of heart disease can be prevented o...
Heart disease causes depend on the specific type of heart disease. There are many different types of heart disease.
Risk factors for heart disease include: 1. Age.Growing older increases the risk of damaged and narrowed arteries and a weakened or thickened heart muscle. 2. Sex.Men are generally at greater risk of heart disease. The risk for women increases after menopause. 3. Family history.A family history of heart disease increases the risk of coronary artery ...
Complications of heart disease include: 1. Heart failure.This is one of the most common complications of heart disease. Heart failure occurs when the heart can't pump enough blood to meet the body's needs. 2. Heart attack.A heart attack may occur if a blood clot is stuck in a blood vessel that goes to the heart. 3. Stroke.The risk factors that lead...
The same lifestyle changes used to manage heart disease may also help prevent it. Try these heart-healthy tips: 1. Don't smoke. 2. Eat a diet that's low in salt and saturated fat. 3. Exercise at least 30 minutes a day on most days of the week. 4. Maintain a healthy weight. 5. Reduce and manage stress. 6. Control high blood pressure, high cholestero...
Sep 30, 2020 · Here, learn about the structure of the heart, what each part does, and how it works to support the body. We also explore the electrical impulses and the role of CPR. Medical News Today
Nov 12, 2023 · What Is the Heart? Learn how this fist-sized organ pumps blood through your body, how it works, its anatomy, what conditions affect it, and more.
Mar 24, 2022 · The heart is made of three layers of tissue. Endocardium is the thin inner lining of the heart chambers and also forms the surface of the valves. Myocardium is the thick middle layer of muscle that allows your heart chambers to contract and relax to pump blood to your body.
Jan 26, 2024 · As the main organ of your circulatory system, your heart keeps you alive. It pumps blood throughout your body, bringing oxygen to your cells and tissues. Since your heart plays such a vital role, it’s important to take care of it. Conditions that affect your heart are very common, but you have the power to make changes for a stronger heart.
