Vestibulocochlear Organs Text 2

 

课文(二):耳朵的保护

耳朵是人体的重要器官,然而,人们却常常忽视对耳朵的爱护。下面就介绍两个关于保护耳朵的小常识。

杜绝掏耳朵

有的人感觉耳朵痒了或者脏了,常常用指甲、挖耳勺等掏耳朵,其实这样做有很多害处,而且也没必要。

首先,人的外耳皮肤比较娇嫩,皮下组织少,血液循环差,掏耳朵时如果用力不当容易引起外耳道损伤、感染。

此外,耳朵有自我清洁的功能。在外耳道外侧软骨表面的皮肤中有腺体,能分泌一种淡黄色粘稠的物质,俗称“耳垢”。这种物质有的遇空气干燥后呈薄片状,有的如粘稠的油脂。平时“藏”在外耳道内,具有保护外耳道皮肤和粘附外来物质(如灰尘、小飞虫等)的作用。借助人的头部活动、咀嚼食物、张口等动作,耳垢多可自行排出。

耳朵防受冻

耳朵突出在头部两侧,由于缺少皮下脂肪的保护,耳廓的血管表浅,遇到寒冷刺激时,血管收缩易发生缺血、缺氧,出现耳廓冻伤。此时,用手轻轻按摩耳廓可促进局部血液循环。千万不可立即到室内去吹热风或用热毛巾等突然加热,以免引起血管痉挛,而造成局部坏死。为了预防耳廓冻伤的发生,应注意防寒保暖,可配戴柔软的防护耳罩。

 

Chinese Part of Speech Pinyin English
挖耳勺 (n) wā’ěrsháo earpick
皮下组织 (n) píxià zǔzhī subcutaneous tissue
耳垢 (n) ěrgòu earwax
油脂 (n) yóuzhī grease, oil
耳廓 (n) ěrkuò auricle, pinna
痉挛 (v) jìngluán spasm
坏死 (v) huàisǐ necrosis

 

Text (2): ear protection

Ear is an important organ of the human body. However, people often ignore caring for their ears. Here are two little things about ear protection.

 

Put an end to sticking things in your ear to clean the wax.

 

Some people feel that their ears are itchy or dirty. They often use their fingernails, ear scoop and so on to clean their ears. In fact, doing so is harmful and unnecessary.

First of all, people’s outer ear skin is tender. The subcutaneous tissue has poor blood circulation.

If improper force is used to clean the ears it can easily cause external auditory canal injury or infection.

In addition, the ear has a self-cleaning function. There are glands in the skin on the surface of the cartilage outside the external auditory canal that can secrete a yellowish and viscous substance, commonly known as “earwax”. Some of the substances are flaky when they dry in the air, and some are as thick as grease. It is usually “hidden” in the external auditory canal to protect the skin of the external auditory canal and adhere to foreign substances (such as dust and small flying insects). With the help of head movement, chewing food, mouth opening and other movements, most of the earwax can be automatically discharged.

 

Protecting ears against cold.

 

Ears protrude on both sides of the head. Due to the lack of protection from subcutaneous fat, the blood vessels of the pinna are superficial. When encountering cold stimulation, blood vessel contraction makes the outer ear prone to ischemia and hypoxia, leading to pinna frostbite. When this happens, gently massage the auricle by hand to promote local blood circulation. Do not immediately go indoors to blow hot air or use hot towels and other sudden heating, so as not to cause vasospasm, and cause local necrosis. In order to prevent the occurrence of auricle frostbite, attention should be paid to keep the ears warm. One can wear soft, protective earmuffs.