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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 …

May 10, 2025 · 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 …

Nov 3, 2023 · Overview of the anatomy and functions of the heart. The heart is a muscular organ that pumps blood around the body by circulating it through the circulatory/vascular system. It is …

The heart is a muscular organ that pumps blood throughout the body. It has four chambers - two atria and two ventricles - that work together to coordinate the flow of blood.

Jul 27, 2022 · The human heart has four chambers: two upper chambers (the atria) and two lower ones (the ventricles), according to the National Institutes of Health. The right atrium and right …

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 …

Apr 15, 2025 · The heart consists of three main tissue layers: endocardium, myocardium, and epicardium. Valves prevent backflow and ensure blood flows in the correct direction. Structural …

Jan 2, 2023 · These 3 layers of the heart are embryologically equivalent to the 3 layers of blood vessels: tunica adventitia, tunica media, and tunica intima, respectively. A double-layer, fluid …

In humans, the heart is divided into four chambers: upper left and right atria and lower left and right ventricles. [5][6] Commonly, the right atrium and ventricle are referred together as the …

Sep 30, 2020 · In this article, we explore the structure of the heart, how it pumps blood around the body, and the electrical system that controls it. The heart consists of four chambers: The atria: …