In brief: How does the heart work? - InformedHealth.org - NCBI Bookshelf
2023年6月6日 · The heart provides the body’s organs and tissues with a constant supply of blood – and with it vital oxygen and nutrients. You can think of the heart as a central pump that keeps the blood circulating around the body.
Human Heart - Anatomy, Functions and Facts about Heart - BYJU'S
Human Heart is a muscular organ, it is mainly responsible for circulating blood throughout the body through blood vessels. Explore its structure, functions and facts only at BYJU'S Biology Login
Heart | Structure, Function, Diagram, Anatomy, & Facts | Britannica
2 天之前 · 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. Learn more about the heart in this article.
Heart: Anatomy & Function - Cleveland Clinic
2024年1月26日 · 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.
The human heart - Heart Research Institute
The heart is one of the most important organs in the human body. It is a powerful fist-sized muscle that pumps blood around the body through a network of blood vessels – together, the heart and blood vessels make up the body’s cardiovascular system. Our hearts beat on average 72 times every minute – over 100,000 times per day.
How the Heart Works - What the Heart Looks Like - NHLBI, NIH
2022年3月24日 · Myocardium is the thick middle layer of muscle that allows your heart chambers to contract and relax to pump blood to your body. Pericardium is the sac that surrounds your heart. Made of thin layers of tissue, it holds the heart in place and protects it.
How the Normal Heart Works - Children's Hospital of Philadelphia
Located in the center of the chest, the heart is the hardest working muscle in the human body — always working, even while we are sleeping. The heart and blood vessels together make up the body's cardiovascular system and are vital to supplying the body with the necessary oxygen and nutrients needed to survive.
Human heart: Anatomy, function & facts - Live Science
2022年7月27日 · The human heart is an organ that pumps blood throughout the body via the vessels of the circulatory system, supplying oxygen and nutrients to the tissues and removing carbon dioxide and other...
How Your Heart Works - Healthline
2018年9月21日 · As the heart beats, it provides pressure so blood can flow to deliver oxygen and important nutrients to tissue all over your body through an extensive network of arteries, and it has return...
How the Heart Works - The Heart - NHLBI, NIH
2022年3月24日 · The heart is an organ about the size of your fist that pumps blood through your body. It is made up of multiple layers of tissue. Your heart is at the center of your circulatory system. This system is a network of blood vessels, such as arteries, veins, and capillaries, that carries blood to and from all areas of your body.