首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
Body Systems A body system refers to a group of organs, which are parts of the body that do a special job, such as the heart,
Body Systems A body system refers to a group of organs, which are parts of the body that do a special job, such as the heart,
admin
2011-02-11
42
问题
Body Systems
A body system refers to a group of organs, which are parts of the body that do a special job, such as the heart, lungs and kidneys.
Ten major body systems in the human body:
1)the skeletal system, which includes the bones and the 【1】______ 【1】______
tissues.
2)the muscle system, which plays the role of moving the body, pushing
the food through the body and making the blood 【2】______ 【2】______
3)the nervous system which is made up of the brain, the spinal
【3】______and the nerves. 【3】______
4)the 【4】______system which comprises of the stomach and the 【4】______
intestines and 【5】______food to provide energy for the body. 【5】______
5)the respiratory system which consists of the windpipe and
【6】______and takes air into the body. 【6】______
6)the circulatory system which includes the blood, the heart, and all the
blood 【7】______ 【7】______
7)the 【8】______system made up of the kidneys and bladder. 【8】______
8)the lymphatic system.
9)the endocrine system composed of special 【9】______which give 【9】______
out hormones.
10)the 【10】______system consisting of organs involved in making 【10】______
new human beings.
【2】
Well now, let’s have a look at body systems, I’m going to run through them all very quickly and then we can have a look at them in detail. Now first, ah, have a look at the illustration showing some of the body’s organs. Now you should know most of these already. When we think of organs we usually think of the heart, lungs and kidneys. But, of course, the eyes, ears and brain are also organs and there are many more. Organs are part of the body that do a special job. Now, a group of organs working together is called a system. There are 10 main systems in the human body and they all work together to keep the body going.
Now let’s have a quick look at these systems.
Now first—the skeletal system. That’ s the bones and the things that hold them together, that we call connective tissues. The skeletal system is the framework of the body. It gives the body its shape and form and it protects the heart, lungs and the brain.
The muscle system has the role of moving the body. It also pushes food through the body and makes the blood circulate.
Now you can see how these systems work together. The bones couldn’t move without the muscles. And all the systems are controlled by the nervous system. This is made up of the brain, the spinal cord and the nerves. And this system controls all muscle movement. It also controls your senses and makes it possible for you to learn and remember things.
Now some people say that the nervous system is the most important system of all but that isn’t really true because all the systems have to work together to keep us alive. They are all essential to life. So you can’ t really say that one is more important than another.
Now, the digestive system. The stomach and the intestines are the main parts of this system. They have the job of processing food to provide energy for the body. Food is broken down to a simpler form so that it can be absorbed into the blood. The waste products are removed from the body through the rectum at the end of the intestines.
The respiratory system consists of the windpipe and lungs and it takes air into the body. It also separates out the oxygen needed to turn the food you eat into energy for the body. The lungs also get rid of the carbon dioxide, which is collected from the cells by the blood.
The blood, the heart and all the blood vessels form the circulatory system. Now this system carries the food and oxygen around the body. It also collects the waste from the cells and fights bacteria-germs--in the body.
The urinary system is made up of the kidneys and bladder. And this system filters certain wastes from the blood and removes them from the body as urine.
Now can you see how all these systems are working together--pouring things into the blood and filtering other things out of it—and keeping you alive?
Next is the lymphatic system. Now you probably haven’t heard of this one and it’s fairly hard to describe. Lymph is a clear liquid which comes from the blood. It leaves the blood vessels and moves throughout the body, picking up wastes as it goes—things that the body doesn’t want. When it has done its job the lymph flows back into a large blood vessel near the neck. The wastes that it has picked up are then filtered out of the body through the blood.
The endocrine system could be called the body’s chemical control. This system is made up of special glands found in many parts of the body. These glands give out hormones which are like chemical messengers. These tell different body systems how to operate. They control things like how tall people become and how energetic they feel.
Finally, the reproductive system. This consists of a group of organs involved in making new human ’beings. In males, the main organs of the reproductive system are the testes and in the females they are the ovaries and the uterus.
Now, er, let’s look at some of these systems in more detail ...
选项
答案
circulate
解析
转载请注明原文地址:https://kaotiyun.com/show/EUYO777K
0
专业英语八级
相关试题推荐
Neartheendofafive-daytourofhighlyautomated,high-techJapanesefactories,theAmericanvisitorwasoverwhelmedandfeel
Whoistheauthorof"CommonSense"?
A、BecauseIndiaandChinafoughtthereB、BecauseitbecomesdependentontheimportC、BecausetheIndiangovernmentregardedthi
ItispossibleforstudentstoobtainadvanceddegreesinEnglishwhileknowinglittleornothingabouttraditionalscholarlyme
Rabiesisanordinarilyinfectiousdiseaseofthecentralnervoussystem,causedbyavirusand,asarule,spreadchieflybydo
TheuniquenessoftheJapanesecharacteristheresultoftwo,seeminglycontradictoryforces:thestrengthoftraditionsandse
______looksatlanguagefromapsychologicalpointofview,andtohim,competenceisapropertyofthemindofeachindividual
Priorto1905,spaceandtimewerecomfortableabsolutes.Over250yearsofpracticalexperienceandexperimentationhadfirmly
A、atraditionalartistB、asculptorC、aninteriordecoratorD、ahousedesignerB
名声、财产、知识等等都是身外之物,人人都可求而得之,但没有人能够代替你感受人生。你死以后,没有人能够代替你再活一次。如果你真正意识到了这一点,你就会明白,活在世上,最重要的事情就是活出你自己的特色和滋味来。你的人生是否有意义,衡量的标准不是外在的成功,而是
随机试题
对外直接投资的含义。
下列关于药物主治病证的叙述,错误的是
下列哪项在心主血脉中起关键作用
A.热原B.内毒素C.脂多糖D.磷脂E.蛋白质是所有微生物的代谢产物
信息可以分为()。
背景A公司经过招投标承包某轧钢生产线机电设备安装工程,合同暂估总价,结算时以合同约定的工程单价和实发工程量进行结算,工程单价不作调整。施工过程中发生下列事件:事件一:工程开工后,原材料涨价和机械租赁费涨价,施工单位因工程成本过高,向业主提出费用
外部融资销售增长比就是每增加1元销售收入需要追加的外部融资额。计算外部融资销售增长比的目的包括()。
班级管理的主要功能是()。
单位要你组织一个新闻发布会.当场有记者提出你单位有违规现象。导致现场很混乱.你要怎么处理?
一件白衬衫在灯光昏暗的房间里和在阳光明媚的户外亮度不同,但是人们仍然将其知觉为白衬衫。这种知觉特性是()。(2010年)
最新回复
(
0
)