3 Fighting Sickness

FIGHTING SICKNESS

对抗疾病

THE IMMUNE SYSTEM We're white blood cells! We're part of your body's immune system. We work together with other organ systems to help protect the body from harmful invaders! We use blood vessels to travel to the farthest reaches of your body.

免疫系统我们是白细胞！我们是你身体免疫系统的一部分。 我们与其他器官系统一起工作，帮助保护身体免受有害入侵者的侵害！我们利用血管将血液输送到身体的最深处。

White blood cells are manufactured inside certain bones. Within these bones, white blood cells make antibodies- -your body's first responders. Antibodies float through the body... ...latching onto and smothering invaders. shunk So, as you go about your everyday business... ...know that we're patrolling around inside... ...fighting sickness!

白细胞是在某些骨骼内部产生的。 在这些骨骼中，白细胞产生抗体——你身体的第一反应者。 抗体在体内漂浮。 …紧紧抓住并窒息入侵者。 所以，当你处理日常事务时…… …知道我们在里面巡逻… …战斗疾病!

MICROBES Your body is made up of billions of tiny cells. But did you know that there are billions of even tinier organisms inside of you as well? Microbes! Microbes in your body are mostly bacteria, but microbes can also be viruses, fungi, or even algae. Most microbes in your body are much smaller than cells. In fact, the bacteria in your intestines are so small they outnumber the rest of the cells in your entire body.

你的身体由数十亿个微小的细胞组成。 但你知道吗，在你体内还有数十亿个更小的生物？ 微生物!你体内的微生物主要是细菌，但微生物也可以是病毒、真菌，甚至藻类。 你体内的大多数微生物都比细胞小得多。 事实上，你肠道里的细菌非常小，它们的数量比你整个身体的其他细胞都要多。

Some microbes, like the bacteria living in your digestive system, can be helpful. But, beware, microbes can also be harmful! Harmful microbes are commonly called germs. Your body needs a healthy immune system to kill germs before they get out of control!

一些微生物，比如生活在你消化系统中的细菌，可能会有帮助。 但是，要注意，微生物也可能有害！有害微生物通常被称为病菌。 你的身体需要一个健康的免疫系统，在细菌失控之前杀死它们！

INFECTION When germs invade your body, it is called an infection. Orifices, or the openings of your body, offer microbes the best chance to get inside. Orifices include your ears, eyes, nose, and mouth. Your skin serves as a microbe protection- -It helps keep microbes out.

当细菌侵入你的身体时，它被称为感染。 你身体的孔洞为微生物进入提供了最好的机会。 孔眼包括耳朵、眼睛、鼻子和嘴巴。 你的皮肤是微生物的保护层- - -它帮助把微生物挡在外面。