What are the heart valves? Heart valves keep the blood fluid flowing in one direction in the same way most pumps work. The heart has two types of valves that keep the blood flowing in the correct direction. The valves between the atria and ventricles are called atrioventricular valves (also ...
___.The heart hasfour chambers: two on the right and two on the left. Two upper chambersare called (5)___(one is an atrium). Two lower chambersare called ventricles. The heart pumps by expanding and contracting of cardiac muscle.How does...
In the human body, the organ that pumps blood is the heart. What is the main function of the heart? A. to digest food B. to breathe air C. to pump blood D. to think 相关知识点: 试题来源: 解析 C。在人体中,心脏是泵血的器官。选项 A 消化食物是消化系统的功能;选项 B 呼吸空气是...
What are the 5 parts of the cardiovascular system? What organs make up the cardiovascular system? What part of the heart pumps blood? What are the parts of the circulatory system? What are the parts that make up a human heart? What organ system contains...
In humans, the heart is a four-chambered organ, with two atria and two ventricles. These chambers separate and hold blood before it is pumped to the rest of the body via blood vessels. Other animals may have fewer chambers, such as a frog, who has a three-chambered heart....
Researchers at the Ted Rogers Centre for Heart Research have uncovered a treasure trove of proteins, which hold answers about how our heart pumps—a phenomenon known as contractility. Led by University of Toronto Physiology Professor Anthony Gramolini and his collaborator, Professor Thomas Kislinger in...
The heart pumps blood around the body. What is the main function of the lungs? A. To digest food. B. To filter waste. C. To take in oxygen and release carbon dioxide. D. To control movement. 相关知识点: 试题来源: 解析 C。本题中 A 选项“To digest food.”是胃的功能;B 选项“...
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