Capillaries are an important part of the circulatory system because nutrient and waste molecules are exchanged only across their thin walls. Veins and smaller vessels called venules carry blood from the capillaries and then join together to from a vein. the wall of a vein is much thinner them ...
相关知识点: 试题来源: 解析 B。解析:“When we are hot, blood vessels near the skin dilate, allowing more blood to flow near the surface and release heat.”,当我们热的时候,皮肤附近的血管会扩张,让更多的血液流向表面并释放热量。反馈 收藏 ...
Blood clots are not a normal condition, but they occur when blood coagulates or hardens. They typically form after the body is injured to prevent excessive bleeding. Also called a thrombus, it is made when blood cells lump together with fibrin, a stretchy, thread-like protein. Research has ...
题目 7.What is the function of the blood vessels in a human body? (3)(1) Pump blood to the heart.(2) Remove impurities from the heart.(3) Carry blood to all parts of the body.(4) Send messages from the brain to the muscles 相关知识点: 试题来源: 解析 (3) 反馈 收藏 ...
百度试题 结果1 题目What are the only vessels that branch from the ascending aorta providing blood to the heart? A. Coronary arteries B. Aorta C. Veins D. Capillaries 相关知识点: 试题来源: 解析 A 反馈 收藏
What blood vessels are composed of entirely endothelial cells? What is the liquid part of the blood cell called? What tissue is a red blood cell part of? What is blood bone marrow disorder? What part of the body makes red blood cells?
The carotid arteries are blood vessels in your neck that carry blood to your brain. How is a stroke treated?Treatment depends on the type of stroke you had:Medicines may be given to prevent blood clots, break up clots, or help your blood clot more easily. You may also need medicines to...
Step-by-Step Solution:1. Identify Blood Vessels with Valves: The blood vessels that contain valves are primarily the veins. 2. Function of Veins: Veins are responsible for carrying blood
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 called cuspid valves), while those at the bases of the large vessels leaving the ventricles are called semilunar ...
One reason is that our blood vessels gradually become stiffer and lose the elasticity needed to shift back and forth.2 Stopping damage Blood’s self-repairing function, called clotting, helps stop bleeding. Certain proteins in the blood help turn “on” and “off” the clotting system as ...