Controlling the rhythm and speed of your heart rate How does the heart function? The heart pumps blood through a system of blood vessels called the circulatory system. Blood vessels are of three types: arteries, capillaries, and veins. These blood vessels carry blood to and from the heart. ...
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Controlling the rhythm and speed of your heart rate How does the heart function? The heart pumps blood through a system of blood vessels called the circulatory system. Blood vessels are of three types: arteries, capillaries, and veins. These blood vessels carry blood to and from the heart. ...
百度试题 结果1 题目18 The diagram shows the human heart and main blood vessels.lungs Xrest of body What is the blood vessel labelled X?C A aorta B pulmonary artery C pulmonary vein Dvena cava 相关知识点: 试题来源: 解析 C 反馈 收藏 ...
The heart has its own blood vessels that supply the heart muscle with blood. The coronary arteries branch from the aorta and surround the outer surface of the heart like a crown. They diverge into capillaries where the heart muscle is supplied with oxygen before converging again into the corona...
Arterioles control the flow of blood with the large amounts of smooth muscle in their walls by using two processes known as vasodilation (dilation of the blood vessels) and vasoconstriction (constriction of the blood vessels). Due to these processes, arteries are able to control blood pressure ...
Chapter V ThoraxD. Heart and blood vesselsHeart Part IIby Dr. Zhuo-ren Lu
Cardiovascular diseaseis a group of conditions that affect your heart and blood vessels. It's sometimes also called heart disease. Conditions that affect your heart and blood vessels can include problems you're born with, heart valves that don't work they way they should, and irregular heart ...
Circulatory system - Heart, Blood Vessels, Oxygen: All vertebrates have circulatory systems based on a common plan, and so vertebrate systems show much less variety than do those of invertebrates. Although it is impossible to trace the evolution of the c
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