The human heart functions as a pump that circulates blood throughout the body, playing a vital role in sustaining life around the clock.
It beats approximately 100,000 times per day, continuously moving about 5 litres of blood through a complex network of arteries and veins known as the circulatory system.
This process delivers oxygen and essential nutrients to organs and muscles, supporting their proper function, while also removing carbon dioxide and other waste products from the body.
The human heart beats approximately 100,000 times per day, adding up to more than 2.6 billion beats over an average lifetime.
The human heart pumps blood through an estimated 60,000 miles (96,000 kilometers) of blood vessels. To put this into perspective, this vast network of vessels is long enough to wrap around the Earth’s equator twice.
The familiar “lub-dub” sound of the heartbeat is produced by the opening and closing of the heart’s valves.
An adult human heart is roughly the size of two hands clasped together, while a child’s heart is approximately the size of a single fist. To accommodate the heart in the chest cavity, the left lung is slightly smaller than the right lung.
The smallest known animal heart belongs to fairyflies. It is so tiny that it can only be seen under a microscope.
Coronary arteries
Coronary arteries are the blood vessels that deliver oxygen-rich blood to the heart muscle. They branch off from the aorta, the body’s main artery.
When these arteries become narrowed due to fatty deposits building up in their walls, coronary artery disease (also known as coronary heart disease) can develop.
If part of this fatty buildup breaks away, a blood clot may form at the site as the body tries to repair the damage. This clot can block blood flow through the coronary artery, stopping oxygen from reaching the heart muscle and causing a heart attack.
Cholesterol
Cholesterol is a waxy, fat-like substance in your cells. Our bodies generally make all the cholesterol needed for good health. Cholesterol helps make hormones, vitamin D, and substances to help you digest foods. Small packages, called lipoproteins, carry cholesterol through your bloodstream.
Two kinds of lipoproteins carry cholesterol: High-density lipoprotein (HDL) is the “good” cholesterol.
HDL helps your body get rid of cholesterol so it doesn’t clog your arteries. Low-density lipoprotein (LDL) is the “bad” cholesterol.
LDL deposits cholesterol inside the blood vessels that carry blood to your heart and other parts of your body. Over time, this may cause your arteries to narrow or be blocked. Triglycerides are a type of fat in your blood that your body uses for energy. A combination of high triglyceride and low HDL levels can increase your risk for heart attack and stroke.
WHO perspective
According to the World Health Organization (WHO), cardiovascular diseases (CVDs) are the leading cause of death globally. In 2022, an estimated 19.8 million people died from CVDs, accounting for around 32% of all deaths worldwide, with about 85% of these caused by heart attacks and strokes.
More than three quarters of CVD-related deaths occur in low- and middle-income countries. In addition, CVDs were responsible for at least 38% of the 18 million premature deaths from noncommunicable diseases in 2021.
Most cardiovascular diseases can be prevented by addressing key behavioural and environmental risk factors, including tobacco use, unhealthy diet (such as excess salt, sugar and fats), obesity, physical inactivity, harmful use of alcohol, and air pollution.
27.06.2026.
SOURCE
https://health.clevelandclinic.org/fun-facts-about-your-heart https://www.bhf.org.uk/informationsupport/how-a-healthy-heart-works https://www.hopkinsmedicine.org/health/wellness-and-prevention/5-heart-facts-that-may-surprise-you https://www.nhlbi.nih.gov/resources/heart-smart-basics-what-know-keep-yours-healthy-fact-sheet https://www.who.int/news-room/fact-sheets/detail/cardiovascular-diseases-(cvds)
Photo: Magnific
