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  1. www.britannica.com › science › heartHeart | Structure, Function, Diagram, Anatomy, & Facts ...

    Oct 31, 2024 · heart, organ that serves as a pump to circulate the blood. It may be a straight tube, as in spiders and annelid worms, or a somewhat more elaborate structure with one or more receiving chambers (atria) and a main pumping chamber (ventricle), as in mollusks. In fishes the heart is a folded tube, with three or four enlarged areas that correspond ...

    • Kids

      Heart disease can lead to a heart attack. A heart attack...

    • Coronary Heart Disease

      coronary heart disease, disease characterized by an...

    • Heart Rate

      heart rate, the number of times the ventricles of the heart...

    • Pulmonary Circulation

      pulmonary circulation, system of blood vessels that forms a...

    • Heart Murmur

      heart murmur, condition characterized by prolonged noises...

    • Students

      Encyclopædia Britannica, Inc. A muscular, pear-shaped organ...

    • Ventricle

      In humans, the ventricles are the two lower chambers of the...

    • Chambered Heart

      Other articles where chambered heart is discussed:...

  2. biologydictionary.net › heartHeart (Human Anatomy): Overview, Function & Structure | Biology

    • Heart Definition
    • Function of The Heart
    • Heart Structure
    • Quiz

    The heart is a muscular organ that pumps blood throughout the body. It is located in the middle cavity of the chest, between the lungs. In most people, the heart is located on the left side of the chest, beneath the breastbone. The heart is composed of smooth muscle. It has four chambers which contract in a specific order, allowing the human heart ...

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    The heart pumps blood through our immense and complicated circulatory systems at high pressure. It is a truly impressive feat of engineering, as it must circulate about five liters of blood through a full 1,000 miles worth of blood vessels each minute! We will talk more about how the heart accomplishes this remarkable task under the “Heart Structur...

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    The heart’s unique design allows it to accomplish the incredible task of circulating blood through the human body. Here we will review its essential components, and how and why blood passes through them.

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    1. Which of the following is NOT true of the human heart? A. It has four chambers. B. It has a built-in “pacemaker” called the sinoatrial node. C. It is responsible for pumping oxygen-filled blood around the body. D.It is the only organ in the body you cannot live without. 2. Which of the following is NOT a layer of the heart? A. The myocardium B. ...

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  4. my.clevelandclinic.org › health › bodyHeart: Anatomy & Function - Cleveland Clinic

    Your heart pumps blood through three types of blood vessels: Arteries carry oxygen-rich blood from your heart to your body’s tissues. The exception is your pulmonary arteries, which go to your lungs. Veins carry oxygen-poor blood back to your heart. Capillaries are small blood vessels where your body exchanges oxygen-rich and oxygen-poor blood.

  5. anatomy.co.uk › heartHeart - Structure, Function, Anatomy, Location, Diagram

    Nov 10, 2024 · The heart functions as a vital pump responsible for circulating blood throughout the body. Its primary role is to maintain the flow of oxygenated and deoxygenated blood to sustain bodily functions. The heart achieves this through a coordinated system of chambers, valves, and electrical impulses, which work together to regulate blood flow, pressure, and oxygen delivery.

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    • Parts Of The Human Heart And Their Functions | MedicineBTG.com
    • Parts Of The Human Heart And Their Functions | MedicineBTG.com
    • What is the structure and function of the human heart?
    • heart | Structure, Function, Diagram, Anatomy, & Facts | Britannica

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  7. www.news-medical.net › health › Structure-andStructure and Function of the Heart - News-Medical.net

    Sep 4, 2022 · Structure and Function of the Heart. As the central part of the circulatory system, the heart is responsible for pumping blood, supplying oxygen and nutrients, and removing metabolic waste such as ...

  8. www.ncbi.nlm.nih.gov › books › NBK279249In brief: How does the heart work? - InformedHealth.org ...

    Jun 6, 2023 · The heart muscle is made up of special cells – the heart muscle cells – that contract rhythmically. An electrical “wiring system” is responsible for causing the heart to beat. Each heartbeat is triggered by an impulse that starts in the sinus node, which is a group of cells in the wall of the right atrium.

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  10. byjus.com › biology › human-heartHuman Heart - Anatomy, Functions and Facts about Heart - BYJU'S

    The function of the heart in any organism is to maintain a constant flow of blood throughout the body. This replenishes oxygen and circulates nutrients among the cells and tissues. Following are the main functions of the heart: One of the primary functions of the human heart is to pump blood throughout the body.