[答案]A [解析]细节理解题。根据第二段中的”AirWave is able to scan more than a million micro-feature points in the palm(手掌) of the hand within 0.3 seconds, making it virtually impossible to cheat"可知,基于静脉的识别系统使得欺骗几乎不可能发生。选项中的"impossible""cheating"为词汇复现。反...
The femoral vein is a blood vessel that returns blood in the leg to the heart via the iliac veins. If the femoral vein becomes...
Name the three veins that return blood into the right atrium. List the three types of capillaries. What are the three main functions of the circulatory system? What are the primary structural and functional differences between arteries and veins? How do veins differ from...
Circulatory: The job of the circulatory system is to move blood, nutrients, oxygen, carbon dioxide and hormones around the body. It consists of the heart, blood, blood vessels, arteries and veins. According to the Cleveland Clinic, the adult human body's network of blood vessels is more tha...
Capillaries are an important part of thecirculatory system because nutrient and wastemolecules are exchanged only across their thin walls.Veins and smaller vessels called venules carry bloodfrom the capillaries and then join together to from avein. the wall of a vein is much thinner them that of...
As a vein is trying to return the blood back to the heart, when the skeletal muscles surrounding the vessel contracts, it squeezes the vein and helps to push the blood up and towards the heart.Answer and Explanation: Veins will function to allow blood to return back to the heart. They ...
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"Wow," I thought, "Our vascular system -- all the veins and arteries in our body making miracles of logistics every day." This is the moment I realized that biology has been in the transportation business for billions of years. It has been testing countless solutions to move nutrients, ...
The human circulatory system is a network of arteries, veins, and capillaries through which blood is pumped by the heart. Its principal function is to supply nutrients, minerals, and hormones to various regions of the body. Alternatively, the circulatory system is in charge of collecting metabolic...
While all vessels are essential components of the circulatory system, veins have unique adaptations for their role in blood return, including the presence of valves and the ability to expand to accommodate varying volumes of blood. This adaptability is crucial for maintaining steady blood flow back ...