arachnoid

arachnoid的音标是[ˌærəˈknaɪəʊ]，基本翻译是蛛网膜，速记技巧是联想图像：蜘蛛（arachnid）在网膜（retina）上织网。

Arachnoid这个词来源于希腊语，意思是“蜘蛛网状物”。它的变化形式包括其复数形式arachnoides和过去分词arachnoidos。

相关单词：

Arachnophobia：对蜘蛛的恐惧。

Arachnoid mater：蛛网膜。

Arachno-这个词前缀可以表示“蜘蛛网状物”或“蜘蛛”。

例如，arachno-cranial（蛛网状的颅骨）和arachno-deformation（蜘蛛网状变形）。蛛网膜在人体解剖学中扮演重要角色，它覆盖在脑和脊髓的表面。

此外，这个词在英语中也被用于描述某些特殊的脑膜，如弓形层（arachnoid layer），这是脑膜的一部分，它在脑和脊髓的表面形成复杂的结构。这个词的使用反映了神经科学和解剖学的进步，使我们更深入地理解了人体的复杂结构。

常用短语：

1. arachnoid membrane 蛛网膜

2. arachnoid matter 软脑膜

3. arachnoid villi 蛛网膜绒毛

4. arachnoiditis 蛛网膜炎

5. arachnoid space 蛛网膜下腔

6. arachnoid cell 蛛网膜细胞

7. arachnoid granulations 蛛网膜颗粒

例句：

1. The surgeon opened the arachnoid to reveal the delicate brain tissue underneath.

2. The patient experienced severe headaches, caused by arachnoiditis.

3. The arachnoid villi provide the brain with nutrients and oxygen.

4. The arachnoid membrane protects the brain from infection and trauma.

5. The arachnoid space contains cerebrospinal fluid, which cushions the brain.

6. Arachnoid cell function is crucial for maintaining the health of the brain and spinal cord.

7. Arachnoid granulations are responsible for absorbing excess cerebrospinal fluid from the brain.

英文小作文：

Title: The Arachnoid: Protector and Nourisher of the Brain

The arachnoid, a thin layer of tissue that covers the brain, plays a vital role in maintaining its health and function. It serves as a protective barrier against infection and trauma, while also providing essential nutrients and oxygen to the brain.

The arachnoid membrane, made up of delicate fibres, forms a protective layer around the brain, preventing it from external harm. It also acts as a barrier against bacteria and viruses, preventing them from entering the brain and causing infection.

The arachnoid villi, extensions of the arachnoid membrane, provide the brain with nutrients and oxygen through the cerebrospinal fluid that bathes it. This fluid, produced by the choroid plexus, nourishes the brain and cushions it against shocks and movements of the spine.

The arachnoid cells, found in the interstices of the arachnoid membrane, play a crucial role in maintaining the health of the brain and spinal cord. They regulate the flow of cerebrospinal fluid and help maintain the correct pressure within the central nervous system.

In summary, the arachnoid is a complex but essential part of the central nervous system. Its role is multifaceted, protecting the brain from harm, providing it with essential nutrients and oxygen, and maintaining its health and function.