Heart | Structure, Function, Diagram, Anatomy, & Facts | Britannica
2024年10月31日 · 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 · Learn about the parts and functions of your heart, the main organ of your cardiovascular system. Find out how your heart pumps blood, controls its rhythm and pressure, and works with other body systems.
Anatomy of the human heart - Wikipedia
Learn about the structure and function of the heart, a muscular organ that pumps blood through the body. The article covers the four chambers, four valves, coronary circulation, conduction system, and pericardium of the heart.
Heart Pictures, Diagram & Anatomy | Body Maps - Healthline
2015年3月10日 · The heart is a mostly hollow, muscular organ composed of cardiac muscles and connective tissue that acts as a pump to distribute blood throughout the body’s tissues.
Heart Anatomy: Labeled Diagram and Quick Reference - Verywell …
2024年6月11日 · Learn about the heart's structure, function, and anatomical variations with a detailed, labeled diagram and realistic photos. The heart has four chambers, four valves, and three layers of tissue that enable blood circulation throughout the body.
Heart - Wikipedia
Learn about the structure, function, and diseases of the human heart, a muscular organ that pumps blood through the circulatory system. The article covers the four chambers, valves, blood flow, electric rhythm, and clinical significance of the heart.
Heart (Human Anatomy): Overview, Function & Structure | Biology
2019年10月4日 · Learn about the structure and function of the human heart, a muscular organ that pumps blood throughout the body. Find out how the heart is composed of four chambers, three layers, and two circuits, and what causes heart disease.
Heart anatomy: Structure, valves, coronary vessels | Kenhub
2023年11月3日 · The heart is a muscular organ that pumps blood around the body by circulating it through the circulatory/vascular system. It is found in the middle mediastinum, wrapped in a two-layered serous sac called the pericardium. The heart is shaped as a quadrangular pyramid, and orientated as if the pyramid has fallen onto one of its sides so that its ...
How the Heart Works - What the Heart Looks Like - NHLBI, NIH
2022年3月24日 · Your heart is in the center of your chest, near your lungs. It has four hollow chambers surrounded by muscle and other heart tissue. The chambers are separated by heart valves, which make sure that the blood keeps flowing in the right direction. Read more about heart valves and how they help blood flow through the heart.
The heart: Anatomy, how it works, and more - Medical News Today
2020年9月30日 · Learn about the structure and function of the human heart, a muscular organ that pumps blood throughout the body. Find out how the heart has four chambers, four valves, and an electrical...