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  • 心血管系统

    Lesson Objectives
    ::经验教训目标

    • Identify parts of the cardiovascular system.
      ::识别心血管系统的各个部分。
    • State functions of the cardiovascular system.
      ::心血管系统的国家功能。

    Lesson Vocabulary
    ::词汇表课程

    • cardiovascular system
      ::心心血管系统

    Introduction
    ::导言

    What do you do for "cardio"? 
    ::"心电图"是做什么的?

    "Cardio" has become slang for exercise. Cardio is the type of exercise that keeps your heart rate high. Cardio can include biking, running, or swimming. Cardio is short for cardiovascular system. Your heart is in this system. So are your blood and blood vessels. The cardiovascular system is the system of organs that delivers blood to all the cells of the body. It’s like the body’s lifeline. Without the cardiovascular system circulating your blood, you couldn’t survive.
    ::“心脏”已经成为锻炼的口号。 心血管是保持心率高的锻炼类型。 心血管可以包括自行车、跑步或游泳。 心血管是心血管系统的短处。 您的心脏在这个系统中是短处。 您的血液和血管也是如此。 心血管系统是将血液输送到身体所有细胞的器官系统。 这就像身体的生命线。 没有心血管系统循环你的血液,你就无法生存。

    Parts of the Cardiovascular System
    ::心血管系统部件

    Of course, everyone has heard of the heart. It is the engine of your body. The heart and a network of blood vessels make up the cardiovascular system. The network of blood vessels runs throughout the body. The blood in the cardiovascular system is a liquid connective tissue.  Figure    shows the heart and major vessels. You will notice it affects the entire body. The heart is basically a pump. It is what keeps the blood moving through the blood vessels.
    ::当然,每个人都听说过心脏,这是你身体的引擎。心脏和血管网络组成心血管系统。血管网络贯穿整个身体。心血管系统中的血液是一个液体连接组织。图示显示了心脏和主要血管。你会注意到它会影响整个身体。心脏基本上是一个泵。它使血液通过血管流动。

    lesson content

     

    The cardiovascular system transports many substances to and from cells throughout the body.
    ::心血管系统将许多物质运入和运出整个身体的细胞。

    Functions of the Cardiovascular System
    ::心血管系统的功能

    Your cardiovascular system has many jobs. At times the cardiovascular system can work like a pump. This pump pushes your blood through your body. It helps you regulate temperature. It also supplies the cells with what they need to do their job. The cardiovascular system works with all the other organ systems in the body.
    ::您的心血管系统有许多工作。 有时心血管系统可以像泵一样工作。 这个泵能将你的血液推穿身体。 它有助于调节温度。 它还能为细胞提供他们需要做的工作。 心血管系统与身体中所有其他器官系统一起工作。

    Every cell in your body depends on your cardiovascular system. If your cells don't receive what they need, they cannot survive. The main function of this system is to deliver oxygen to your cells. Blood receives oxygen in your lungs, which are a part of the respiratory system. Oxygen-rich blood is then pumped by your heart all around your body.
    ::你身体里的每一个细胞都取决于你的心血管系统。 如果你的细胞得不到它们需要的东西, 它们就无法生存。 这个系统的主要功能是将氧气输送到你的细胞。 血液在你的肺部中接收氧气, 这是呼吸系统的一部分。 氧富血液会被你全身的心脏抽动。

    The cardiovascular system also plays a role in keeping your body  just right. It helps to keep you warm by moving warm blood around your body. Your  keep you from getting too hot or too cold. Your brain acts as the control center. If you are getting too hot, it sends a signal to the blood vessels in your skin. The skin receives these messages and the blood vessels expand. This action increases the amount of blood and heat to move near the skin's surface. The heat is then released from the skin. This helps you cool down. What do you think happens when you are cold? How would your blood vessels react? 
    ::心血管系统也起到了保持身体保持正确的作用。 它有助于通过在身体周围移动温暖的血液来保持你的温暖。 使你不会变得太热或太冷。 您的大脑充当控制中心。 如果您太热, 它会向皮肤上的血管发出信号。 皮肤会收到这些信息, 血管会膨胀。 此动作会增加血液和热量, 以接近皮肤表面。 热量会从皮肤中释放出来。 这会帮助你冷静下来。 您认为冷的时候会发生什么? 您的血管会有什么反应?

    The blood also carries other special chemicals. These special chemicals are produced by organs of the endocrine system and carried through your body. These special chemicals are produced in one area of your body and have an effect on another. To get to that other area, they must travel through your blood. You may have heard of adrenaline. You may have heard the term, “My adrenaline is pumping.” Adrenaline is produced by the adrenal  on top of the  . Adrenaline has multiple effects on the  . We mostly feel its effects as a quicker heart rate.
    ::血液中还含有其他特殊化学物质。 这些特殊化学物质由内分泌系统的器官产生,并通过你的身体携带。 这些特殊化学物质是在你身体的一个区域生产,对另一个区域有影响。 要到达另一个区域,它们必须经过你的血液。你可能听说过肾上腺素。你可能听说过这个术语 , “ 我的肾上腺素在抽水 。 肾上腺素是肾上腺素产生的。 肾上腺素对身体有多重影响。 我们大部分认为它的影响是更快的心率。

    Lesson Summary
    ::经验教训摘要

    • The cardiovascular system consists of the heart, a network of blood vessels, and blood. Blood is a liquid tissue. The heart is a pump that keeps blood flowing through the vessels of the system.
      ::心血管系统由心脏、血管网络和血液组成。血液是一种液体组织。心脏是一种使血液通过系统血管流动的泵。
    • The main function of the cardiovascular system is transport. It carries special chemicals, oxygen, nutrients, and cellular wastes around the body. The cardiovascular system also helps regulate body temperature by controlling blood flow.
      ::心血管系统的主要功能是迁移,在身体周围携带特殊的化学品、氧气、养分和细胞废物,心血管系统也通过控制血液流动来帮助调节身体温度。

    Lesson Review Questions
    ::经验回顾问题

    Recall
    ::回顾

    1. List the parts of the cardiovascular system.
      ::列出心血管系统的各个部分。
    1. State two general functions of the cardiovascular system.
      ::心血管系统的两种国家一般功能。

    Apply Concepts
    ::应用概念

    1. The cardiovascular system has been called the highway system of the body. Do you think this is a good analogy for the cardiovascular system? Why or why not?
      ::心血管系统被称作身体的高速公路系统。 您认为这是心血管系统的好比吗? 为什么不行?