After failing, he tucked his tail between his legs and ran away.

In order to succeed, you need the right mindset.

He was diagnosed with a problem in the arachnoid of his brain.

During pregnancy, the decidua plays a crucial role in protecting the fetus.

The membrane potential of nerve cells is a fundamental mechanism of information transmission.

Maximilian is my best friend.

The membrane surrounding a bird's egg plays an important role in protecting the egg.

He contracted meningitis.

Tetsu is my best friend.

Mr. An is my best friend.